Bagger Ultra 25L Backpack
This is absolutely perfect. Ease of loading and unloading along with typical Zpacks quality. Fits great and weighs nothing.
– Mark P., ★★★★★
The Bagger Ultra 25L is the ultimate small travel backpack to take you from plane, to town, to trail. It is sized to fit under airplane seats and can even count as your personal item on budget airlines. With the right gear list you can bag a peak or two on a daytrip excursion or even do a couple overnights with a Summer Quilt, an ultralight tent, and room to spare.
Featuring a small and streamlined design, the Bagger can be packed as a secondary backpack for summit side trips or used as an ultralight minimalist pack for short adventures into the backcountry. The Bagger utilizes an included, easily removable foam sit pad that doubles as a frame and padding against your back.
With 3 different interchangeable strap designs, a removable belt, a comfy sit pad, and a bunch of cool modular add-ons, the versatile Bagger Ultra is your ticket to maximizing day hikes, weekend trips, or commutes.
- Small and streamlined design.
- Ultra 100X fabric features a woven Ultra High Molecular Weight Polyethylene (UHMWPE) face fabric laminated to a waterproof backing. Ultra fabric boasts extremely high abrasion and tear resistance and is the strongest fabric we offer.
- Ultra fabric is not coated with DWR or other chemicals and is PFAS free.
- The pack material is waterproof and is constructed using hydrophobic thread, and all seams and attachment points are taped, making the pack highly water resistant.
- The pack material is waterproof. All seams and attachment points are taped and the pack is constructed using hydrophobic thread, making the packs highly water resistant.
- The pack should keep water out in typical backpacking conditions where the pack is not submerged or exposed to prolonged periods of heavy rain. We still suggest using dry bags or a pack liner to protect important items like your clothing and sleeping bags.
- Access the contents of the spacious main compartment with a waterproof wrap around zipper
- A large external zippered pocket on the outside of the pack is a great place for storing items that you'd like to access quickly.
- The top of the pack features a small zippered pocket, creating the perfect place for storing your phone, keys, or wallet.
- Side pockets are sized to fit one or two 1 liter bottles each. They are positioned low on the pack and slanted forward for easy access without removing the pack.
- A stretchy external sit pad pocket is located on the back of the pack and allows you to easily remove your sit pad on breaks. The sleeve is also a convenient spot to tuck a small laptop or tablet behind the pad when used as a travel bag.
- A closed cell foam sit pad measuring 11" x 15.5" (28 cm x 39.4 cm) is included and adds an additional 1 ounce to the total weight of the pack. The foam pads fits inside the external pocket and provides some cushion and support against your back.
- The Bagger features an interchangeable strap design allowing you to pick the perfect strap for you. The design also allows you to swap out straps for specific adventures. You can choose from our comfy Standard S Straps, Small/Women's Straps, or our Vest Style Straps with integrated water bottle pockets. Check out the Sizing, Straps, & Fit tab for more information on each style strap or click here to purchase additional interchangeable strap styles.
- A detachable 1" webbing belt is optional. The webbing belt can also be added later.
- This pack can be folded up to fit inside a 1 gallon Ziploc bag. It can easily be packed in your luggage or used as a carry-on.
- Looks as nice at the airport as it does on trail. Fits nicely under airplane seats when used as a carry-on.
- All Zpacks gear has a two year limited warranty against defects in materials or workmanship. Please see our return / warranty policy.
- Designed and assembled in the USA from domestic and imported components.
Weight: The weight is displayed near the add to cart button. It changes depending on the options you select.
Included foam sit pad: 11" x 15.5" (28 cm x 39.4 cm) / adds 1 ounce (28 g) to the total weight of the pack.
Belt (optional): 1" (2.5 cm) wide x 50" (127 cm) circumference
Body dimensions: 5.5" x 11" x ~18" (14 cm x 28 cm x 46 cm)
Volume: 25L (18L main body, 1.5L each side pocket, 4L zippered pocket)
Load Capacity: Recommended up to 20 lbs (9 kg) for shoulder comfort. The backpack materials can handle as much weight as your shoulders can for longer carries.
Torso Height:
This backpack has a single belt attachment position. The actual distance on the pack from the bottom of the belt to the top of the shoulder straps is about about 18" (46 cm), which will fit most adults. On a frameless backpack, it is nice to have the shoulder straps roughly level with the tops of your shoulders (rather than wrapping up around them) so that more weight is forced on to the webbing belt. The pack body does not extend much above your shoulders and load lifter straps are not needed.
Shoulder Straps:
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Small/Women's Straps |
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Standard Straps Comfy 3/8" thick by 2.75" wide padded contoured shoulder straps. The straps have a daisy chain for clipping on items like our popular shoulder pouches, shoulder pouches w/ zipper, water bottle sleeves, and an adjustable position sternum strap is included. The shoulder straps have 3D mesh on the underside which gives them a little bit more cushion. |
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Vest Straps Our harness style Vest Straps feature comfy 3/8" thick padding at the shoulders and layered 3D mesh throughout that help wrap and hug your body providing a secure fit when navigating technical terrain or trail running. Each side of the strap features an integrated stretchy Lycra water bottle pockets that fits a 1L SmartWater or Body Armor Bottle, or a 600ml UltraFlask, a stow pocket, and a small zippered pocket perfect for storing energy gels or your keys. The straps have a daisy chain for clipping the two adjustable sternum straps that are included. |
Belt Size:
The webbing belt will fit up to around 50" circumference and can be trimmed down for smaller waists or swapped out for larger waists. To move the belt to a different position, slide off the belt buckle and back the webbing out of the backpack attachment points.
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3.3oz/sqyd Ultra 100X Ultra 100X is composed of a woven 100 denier Ultra High Molecular Weight Polyethylene (UHMWPE) face fabric laminated to a waterproof lining. Our 2nd generation fabric has a 50% thicker, more durable .75 mil laminate with an internal "X" grid for bias strength. The fabric is fully waterproof and has extremely high tear and abrasion resistance. Our Repair Tape and Adhesive products stick extremely well to the interior of this fabric. Weight: 3.3 oz/sqyd (112 g/m²) Tear Strength: 69.4 lbs. warp; 89.6 lbs. fill Water Resistance: >20,000 mmH₂O |
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.3.5 oz/sqyd Mesh This is the mesh that we use on our backpack's center pockets. It has a relatively light weight for mesh, while being difficult to tear. It can withstand getting caught on branches and other typical abrasion that backpacks are subjected to. The hole size is a about 4 mm (a little over 1/8"). Weight: 3.5 oz/sqyd (119 g/m²) |
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5.3 oz/sqyd 3D Spacer Mesh This mesh has a three-dimensional structure which allows airflow and adds cushioning. We use it on the underside of our backpack's shoulder straps and belts to absorb sweat, add cushion, and add grip. Our 3D mesh weighs less than most other types. Weight: 5.3 oz/sqyd (180 g/m²) Thickness: About 3/32" (2.5 mm) |

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Great, but leaks in the rain
My girlfriend and I both have the Zpacks Bagger Ultra 25 and, although we love it otherwise, both of ours leak fairly significantly if they are exposed to even a light rain for half an hour or more. We made the purchase based on my love of my Zpacks Arc Haul Ultra 60L backpack and general appreciation of the quality and innovation of Zpacks gear, so I offer this in the spirit of constructive feedback and to help others make an informed decision. Our Baggers seem to leak along the main zipper. We can't tell whether this is through the zipper itself or because the zipper stitching is not taped, but regardless the pack collects water in the main compartment, which then has nowhere to escape. This is not a deal-breaker, since we always line our packs with a dry bag anyway, but I am considering putting a couple of grommeted holes in the bottom to allow it to drain. Perhaps this is typical of zippered packs, I don't have enough experience with a variety of similar packs to know, but in future I'll probably go with a roll top.

Great new favorite day pack and travel pack
Zpacks does such a great job with weight and quality. I wanted a smaller capacity pack that could be used for hiking and travel. The weight is awesome and it will roll up to nothing. Side pockets are roomy and accessible. The sit pad is perfect as well. It’s the combination I’ve been looking for to satisfy my home based hiking and the surprise hike while traveling. At the same time, I can slide my computer into this and use it as a professional bag for meetings.

Pretty Good
I had a backpack of a competitor prior to getting this one so I compare a lot with my old pack. Both are prone to holes on the bottom. I had this pack a month and noticed that a hole was appearing. At least they sell a lot of repair materials. Overall I like the pack but I have some thoughts. Pros: You can get into easily, that was my main complaint with the other pack. The pockets are big The pack is light and packs down small I am not sure how water proof it is but it sure holds water if you have a spill inside the pack. Cons: The top pocket is angled in a way that you will lose stuff if you forget to zip it which I do often, so I can't put my wallet in there. There are not enough loops on the tip of the pack to hold a trecking pole or an umbrella. What ever that cord is that holds that stuff on most packs is missing so you can't keep tall stuff stable. I wonder when the zipper and elastic in the pockets is going to fail. There are a lot of zippers. I wish there were some built in mesh pockets on the shoulder straps. I had them on my old pack and I miss them. I wish there was an easier way to keep my phone accessible.

Bagger Ultra 25L Backpack
Overall, okay. Would be good to have 2 sizes for Men and Women. The three simple compartments are all you need. The side pockets are nice and deep so things don’t come out. I do need to report that 5 days into the England Coast to Coast 200 mile hike, the shoulder strap broke due to the tiny loop that held the shoulder strap breaking. A quick knot for a field repair got me through the remaining 11 days of the Coast to Coast plus 3 more weeks of day hiking all over the country. I only had water, lunch and a raincoat in the backpack so it was not overloaded. There is some downside to ultralight gear with tiny light straps and buckles. But I appreciate lightweight. Water proofing seemed to work fine. Did have lots of rain but I doubled with a backpack cover because I have experience in LOTS of all day driving rain and wind. Friends on this trip had Ospreys with backpack covers and still had wet stuff. So I’d recommend this pack for waterproofness even though I had a backup cover. The zippers look like good sealed zippers. My stuff stayed completely dry.

Bali trip
Took this ultralight pack on a recent trip to Bali. Performed well. Weight concerns averted.
Dial in your set up with add-ons commonly purchased with our Bagger backpacks.



















Bagger Add-Ons
Ultralight Sunglasses Case
Protect your investment with our Ultralight Sunglasses Case—your new best friend for ultralight, ultra-cool protection! This sleek, minimalist marvel is made from high-tech Robic material, delivering the perfect mix of durability and feather-light convenience. Whether you're conquering rugged trails or cruising through the city, this fleece-lined case keeps your sunglasses scratch-free and ready for adventure.
With a built-in hang loop, this case is all about versatility and easy access. Clip it to your backpack, belt loop, or bike handle for easy access. No more rummaging through your bag—just grab, go, and know your shades are safe and sound.
The magnetic clasp closure adds a touch of modern sophistication while keeping your sunglasses firmly in place. With its streamlined design and advanced materials, our Sunglasses Case is a must-have accessory for any adventurer who values both style and functionality.
Whistle Clip
Stay safe in the backcountry with this ultralight, ultra-tiny whistle clip. This small, low profile whistle is surprisingly loud, and allows you to signal for help when you find yourself in danger on an adventure.
Clip the whistle to your backpack's daisy chain or sternum strap to keep it handy. Or thread a piece of cord through the hole to hang it from a loop.
*This item is not eligible for return.
Ultralight Titanium Whistle
This sleek, high-pitched powerhouse is crafted from top-grade titanium, ensuring it's as tough as your wildest adventures and as light as a feather. Weighing in at a mere fraction of an ounce, it won’t bog down your pack, yet it delivers an ear-piercing blast that cuts through the forest, making it an essential safety tool for hikers, backpackers, and trailblazers.
Attach it to your shoulder strap and be ready to make some noise when it counts. Whether you're navigating dense trails, signaling for help, or just letting your buddies know it's time to pack up, this whistle ensures you're heard loud and clear.
Umbrella Holster
This item has saved many a hike through scorching temperatures and inclement weather. Great product. Will never hit the trail without it.
– Christian D., ★★★★★
The Umbrella Holster allows you to keep your hands free while protecting yourself from the rain and sun with an ultralight umbrella. It easily attaches to the daisy chain on most backpack's straps. In calm weather you can keep both hands on your trekking poles, while in strong wind or driving rain you can rest one hand on the umbrella to control the angle.
The Umbrella Holster consists of a clip and an adjustable shock cord loop that attaches to your shoulder strap.
Attach the buckle above the sternum strap on your strap's daisy chain and then attach the shock cord loop at the bottom of the daisy chain.
Insert your umbrella into the clip and then cinch the shock cord tight around the umbrella’s handle.
Perfect for use with our Lotus UL Umbrella.
Detachable 1" Webbing Belt
Made with 1" (2.5 cm) webbing that is approximately 24" (61 cm) long on each side. The webbing can be trimmed if desired.
Remove the belt buckle, slide the webbing through the loops on your backpack until tight, then replace the belt buckle.
Water Bottle Sleeve
Easy to use. Enough support to be able to slide bottle in and out. Elastic loop holds the bottle in when bending over. Top notch!! Thanks, Zpacks.
– France M., ★★★★★
Water Bottle Sleeves are a great way to keep your water easily accessible while also counter-balancing your backpack. Designed to fit most popular tall slim 1L bottles such as Smart Water, Body Armor, Essentia and similar, these sleeves will attach to the shoulder straps on just about any backpack.
Shoulder Pouch w/ Zipper
Designed for the adventurer on the go, our Shoulder Pouch w/ Zipper is the ideal place to store items that you need on the ready, like a small camera, your wallet, a map or your smart phone. The streamlined design carries comfortably on your shoulder, and you will hardly notice them there.
The small exterior mesh pocket can be used to store your small items like lip balm, emergency whistle, or a compass.
Shoulder Pouch
Keeps your cell phone secure and handy when you need it for navigation or to take a picture. Pouch weighs next to nothing; a must for every serious hiker. I highly recommend this product.
– Paul G., ★★★★★
Shoulder Pouches are the ideal place to keep your small camera or phone in reach for taking quick photos. The main compartment of the shoulder pouches are a good size for your wallet, car keys, map, headlamp, mittens, sunglasses, candy bars, pack towel, GPS, or any other items you would like to have within easy reach. The pouches carry comfortably on your shoulder, and you will hardly notice them there.
The small exterior mesh pocket can be used to store your small items like lip balm, emergency whistle, or a compass.
**DCF material shoulder pouches are priced lower while supplies last. They look fine on Ultra backpacks and function about the same.
Zpacks x Glacial Gear Wool Trail Rag
We've teamed up with Glacial Gear to create the ultimate 100% merino wool ultralight trail rag. Made from 180 gsm Hydro-Duct Merino Wool, it's the ideal companion for adventurers who demand both style and substance on the trail. From banishing stubborn dirt and sweat to confidently snatching that sizzling cook pot handle this rag does it all. Throw in merino wool's odor-fighting superpowers and a handy pack loop for easy access, and consider your trailside needs met.
Front Utility Pack Accessory
Really glad I bought this pouch—it works with my pack’s waist belt, it’s practically weightless, and it’s the perfect size for phone, compass, map and a few snacks.
– Charles Y., ★★★★★
From the summit to the streets, the versatile Front Utility Pack Accessory provides quick and easy access to all your essentials.
With plenty of space for your phone, a camera, a jacket or snacks, the ultralight F.U.P.A. can be worn as a stand-alone item while bagging a peak or for a night out on the town.
Leave the webbing belt at home and connect the F.U.P.A. directly to one of our backpacks for the ultimate pack accessory.
Multi-Pack
Really appreciate the ability to carry it different ways and to carry it alone on days in town. Saves much time and aggravation as you can get to most things you need during your hike when carried on your chest.
– Mark B., ★★★★★
This versatile four-in-one backpack accessory is one of our most popular items. The ability to choose between four different configurations helps make the Multi-Pack the perfect companion for just about any adventure.
Need a spare set of Multi-Pack straps? Click here.
Check out more of our Backpack Add-Ons.
Pair of Shoulder Strap Pads
Excellent, Immediately noticed that the pack was more comfortable with these pads helping to hike longer.
– Louis S., ★★★★★
Our Shoulder Strap Pads add extra padding to your shoulder straps right where you need it. These shoulder strap pads should be compatible with almost any backpack straps. They are made with 3/8" closed cell foam, and a layer of soft cushioning 3D mesh on the underside.
Ultralight Sunglasses Case
Protect your investment with our Ultralight Sunglasses Case—your new best friend for ultralight, ultra-cool protection! This sleek, minimalist marvel is made from high-tech Robic material, delivering the perfect mix of durability and feather-light convenience. Whether you're conquering rugged trails or cruising through the city, this fleece-lined case keeps your sunglasses scratch-free and ready for adventure.
With a built-in hang loop, this case is all about versatility and easy access. Clip it to your backpack, belt loop, or bike handle for easy access. No more rummaging through your bag—just grab, go, and know your shades are safe and sound.
The magnetic clasp closure adds a touch of modern sophistication while keeping your sunglasses firmly in place. With its streamlined design and advanced materials, our Sunglasses Case is a must-have accessory for any adventurer who values both style and functionality.
Whistle Clip
Stay safe in the backcountry with this ultralight, ultra-tiny whistle clip. This small, low profile whistle is surprisingly loud, and allows you to signal for help when you find yourself in danger on an adventure.
Clip the whistle to your backpack's daisy chain or sternum strap to keep it handy. Or thread a piece of cord through the hole to hang it from a loop.
*This item is not eligible for return.
Ultralight Titanium Whistle
This sleek, high-pitched powerhouse is crafted from top-grade titanium, ensuring it's as tough as your wildest adventures and as light as a feather. Weighing in at a mere fraction of an ounce, it won’t bog down your pack, yet it delivers an ear-piercing blast that cuts through the forest, making it an essential safety tool for hikers, backpackers, and trailblazers.
Attach it to your shoulder strap and be ready to make some noise when it counts. Whether you're navigating dense trails, signaling for help, or just letting your buddies know it's time to pack up, this whistle ensures you're heard loud and clear.
Umbrella Holster
This item has saved many a hike through scorching temperatures and inclement weather. Great product. Will never hit the trail without it.
– Christian D., ★★★★★
The Umbrella Holster allows you to keep your hands free while protecting yourself from the rain and sun with an ultralight umbrella. It easily attaches to the daisy chain on most backpack's straps. In calm weather you can keep both hands on your trekking poles, while in strong wind or driving rain you can rest one hand on the umbrella to control the angle.
The Umbrella Holster consists of a clip and an adjustable shock cord loop that attaches to your shoulder strap.
Attach the buckle above the sternum strap on your strap's daisy chain and then attach the shock cord loop at the bottom of the daisy chain.
Insert your umbrella into the clip and then cinch the shock cord tight around the umbrella’s handle.
Perfect for use with our Lotus UL Umbrella.
Detachable 1" Webbing Belt
Made with 1" (2.5 cm) webbing that is approximately 24" (61 cm) long on each side. The webbing can be trimmed if desired.
Remove the belt buckle, slide the webbing through the loops on your backpack until tight, then replace the belt buckle.
Water Bottle Sleeve
Easy to use. Enough support to be able to slide bottle in and out. Elastic loop holds the bottle in when bending over. Top notch!! Thanks, Zpacks.
– France M., ★★★★★
Water Bottle Sleeves are a great way to keep your water easily accessible while also counter-balancing your backpack. Designed to fit most popular tall slim 1L bottles such as Smart Water, Body Armor, Essentia and similar, these sleeves will attach to the shoulder straps on just about any backpack.
Shoulder Pouch w/ Zipper
Designed for the adventurer on the go, our Shoulder Pouch w/ Zipper is the ideal place to store items that you need on the ready, like a small camera, your wallet, a map or your smart phone. The streamlined design carries comfortably on your shoulder, and you will hardly notice them there.
The small exterior mesh pocket can be used to store your small items like lip balm, emergency whistle, or a compass.
Shoulder Pouch
Keeps your cell phone secure and handy when you need it for navigation or to take a picture. Pouch weighs next to nothing; a must for every serious hiker. I highly recommend this product.
– Paul G., ★★★★★
Shoulder Pouches are the ideal place to keep your small camera or phone in reach for taking quick photos. The main compartment of the shoulder pouches are a good size for your wallet, car keys, map, headlamp, mittens, sunglasses, candy bars, pack towel, GPS, or any other items you would like to have within easy reach. The pouches carry comfortably on your shoulder, and you will hardly notice them there.
The small exterior mesh pocket can be used to store your small items like lip balm, emergency whistle, or a compass.
**DCF material shoulder pouches are priced lower while supplies last. They look fine on Ultra backpacks and function about the same.