Sub-Nero Ultra 30L Backpack
The perfect ultralight frameless pack for peak bagging, overnighters, and short trips, the Sub-Nero Ultra is a smaller and slightly more stripped down version of our popular Nero Ultra Backpack.
Streamlined to only the most essential features, the Sub-Nero Ultra is great for hikers with dialed in base weights and minimalist kits.
With 3 different interchangeable strap designs, a removable belt, a comfy sit pad, and a bunch of cool modular add-ons, the versatile SubNero Ultra is your ticket to maximizing every day hike, section hike, or thru-hike. Time to level up your outdoor game!
- 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. 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.
- Provides enough space for gear and food to accommodate most multi-day ultralight adventures.
- The Sub-Nero 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.
- An optional, removable, webbing belt is 1" (2.5 cm) wide and has a maximum adjustment of about 50" (127 cm) circumference. The belt contributes 1.2 ounces (34 grams) to the total weight. It can be trimmed down or removed.
- Features a roll top closure with a stiffened opening which allows you to compress the top of your pack as your gear load shrinks.
- Use the provided top strap to lash items to the top of your pack or upgrade to the optional Nero V-Top Strap to allow you to carry a Bear Canister or other heavier items.
- Large stretchy mesh center pocket is great for quick access items. Mesh also lets you dry wet clothing and gives you a clear view of your gear.
- Side compression straps are made from non-stretchy DyneemaĀ® cord for squishing down the pack volume. They also allow you to stand tall items like trekking poles or an umbrella in the side pockets.
- Side pockets are sized to fit 1 or 1.5 liter bottles. They are positioned low on the pack and slanted forward for easy access without removing the pack. The pockets have drainage holes at the bottom, and elastic that keeps them tight at the top.
- Along the sides and front, you will find a variety of loops for attaching optional add-ons like our top side pockets, shock cord lashing, and ice axe loops.
- 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 provides some cushion and support against your back. The sit pad is held in place with shock cord and comes off quickly for breaks. The shock cord (.3 oz / 8.5 g) and sit pad are removable and replaceable.
- 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.
Foam sit pad adds 1.0 oz (28 g)
Body dimensions: 5.5" x 10" x 19" (14 cm x 25 cm x 48 cm)
Volume: 30L (17L main body, 2.5L each side pocket, 8L center pocket)
Load Capacity: Recommended up to 20 lbs (9 kg)
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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. It has an "X" grid on the interior to add 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/mĀ²) Tear Strength: 69.4 lbs. warp; 89.6 lbs. fill Water Resistance: >20,000 mmHāO |
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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/mĀ²) |
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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/mĀ²) Thickness: About 3/32" (2.5 mm) |
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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- Pennine Way
- Coast to Coast
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Near perfect pack!
I absolutely love the Sub Nero. It is the perfect size for minimalist backpacking. I can fit my sleeping bag, mat, set of clothes and tent inside plus food for a day or two. The pack carries beautifully and is really comfy. The only tiny thing I would improve would be to have the option of dyneema stretch for the back pocket as I find the bullet netting a little loose - I prefer to have items in the back pocket pulled in tight to keep the pack lower profile and neat looking. I will be using this pack for a number of long distance hikes in the UK this year such as the Coast to Coast and the South West Coast Path. I used an older dyneema Nero for the Pennine Way last year and loved it but am looking forward to an even more compact pack on my back this year!

a light and sturdy zack
feel great on one's back

Exactly what I have been searching for
For some time now, I have been looking for the "right" pack for me. After trying six other packs and working through issues that didn't quite match up to what I was working for I tried out the Sub-Nero Ultra 30L backpack. Viola! It does EVERYTHING that I need it to do, checks every box, dots every "i" and crosses every "t"... for me. I encourage anyone that is looking for their "right" pack to try out Zpacks, you might just find your everything!

Great for long dayhikes
I used it for a 100 km hike where I enjoyed it. IT is pretty expensive, so would have loved that bottle holder was included. Otherwise I only would change the part where the pad is, to be mesh instead, for ventilation.

Excellent sac le Nero 30L
Je randonne aussi sur des petits trek, Le Nero en 30L je le trouve vraiment bien. TrĆØs pratique, trĆØs confortable. Excellent sac.
Dial in your set up with add-ons commonly purchased with our Sub-Nero backpacks.























Sub-Nero Add-ons
Pair of Shoulder Strap Pads
Excellent, Immediately noticed that the pack was more comfortable with these pads helping to hike longer.
ā Louis S., ā ā ā ā ā
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 Caseāyour 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 bagājust 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 wonāt 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.
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.
ā France M., ā ā ā ā ā
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.
UltraFlask Speed 600 ML Soft Flask
The Hydrapak UltraFlask Speed 600 ml allows you to drink on the go. Its soft material allows it to fit snugly in most vest pockets and it shrinks as you drink to minimize water movement.
The SpeedFillā¢ cap flips open for quick top ups at aid stations, and the wide mouth can accommodate drink mixes and ice cubes. The included drinking-tube cap can also be swapped out with a BeFree Filter. You can also use just a bite valve without the drinking tube.
A perfect match for our Vest Straps or for our Water Bottle Sleeves. Grab two bottles for balanced hydration.
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.
ā Paul G., ā ā ā ā ā
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.
Nero V Top Strap
Our Nero V Top Strap adds additional stability when youāre carrying heavier items on the top of your backpack.
It can be used to carry a bear canister so long as the canister can squish into your gear as shown.
The Nero V Top Strap is modular and can be added or removed from your pack as necessary.
If you need a V Top Strap for your Arc Frame Backpack, you'll can purchase one specifically designed to work with one here.
Front Utility Pack Accessory
Really glad I bought this pouchāit works with my packās waist belt, itās practically weightless, and itās the perfect size for phone, compass, map and a few snacks.
ā Charles Y., ā ā ā ā ā
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.
ā Mark B., ā ā ā ā ā
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.
ā Louis S., ā ā ā ā ā
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 Caseāyour 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 bagājust 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 wonāt 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.
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.
ā France M., ā ā ā ā ā
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.
UltraFlask Speed 600 ML Soft Flask
The Hydrapak UltraFlask Speed 600 ml allows you to drink on the go. Its soft material allows it to fit snugly in most vest pockets and it shrinks as you drink to minimize water movement.
The SpeedFillā¢ cap flips open for quick top ups at aid stations, and the wide mouth can accommodate drink mixes and ice cubes. The included drinking-tube cap can also be swapped out with a BeFree Filter. You can also use just a bite valve without the drinking tube.
A perfect match for our Vest Straps or for our Water Bottle Sleeves. Grab two bottles for balanced hydration.
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.
ā Paul G., ā ā ā ā ā
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.