Shelter Backpacks Sleeping Bags Accessories Materials FAQs Payments About/Photos
March 2015 - Welcome to ZPacks!

Most accessory items are in stock and are shipping in a day or two. Larger items like Backpacks, Shelters and Sleeping bags, and Rain Gear are made to order and are shipping in about 4-5 weeks.

If you need your order to be delivered sooner or by a certain date please email us after you order and we will schedule accordingly if possible. All ZPacks gear is made for you right here in our US workshop.
ZPacks™ "Arc Slim" Backpack

The Arc Slim is a smaller, slimmed down version of the Arc Blast designed for short, fast hikes while still providing a comfortable carry via our Patent Pending Flexed Arc frame system.

This pack is identical to the 45L Arc Blast except without the pockets. A mesh center pocket and side water bottle pockets are optional.

Arc Slim Backpack:
2,100 ci (35 Liters) - 14.2 ounces (403 grams), $230
5.5" x 12.5" x 30"  (14 cm x 31.8 cm x 76 cm)

Standard Features on the Arc Blast backpack:

  • Our ultralight Flexed Arc Carbon Fiber frame keeps the pack stiff so that most weight is carried on the hips instead of the shoulders. The frame pieces and mesh back panel can be easily removed or replaced.

    The frame is curved to allow air flow and keep your back cushioned from the pack's contents. You can adjust the curve by tensioning the mesh back panel. The recommended arch is about 2.5" (6 cm), but feel free to experiment.

    The frame has two horizontal support bars for more stability.
  • Roll top closure (like our dry bags) keeps water out, and lets you roll down the top as your gear load shrinks.  All seams and attachment points are taped water tight!
  • Comfy 3/8" thick by 2.5" wide padded contoured shoulder straps and padded belt. Both the straps and the belt have a daisy chain for clipping on items, and an adjustable position sternum strap is also included.
  • By default there are no pockets for a lightweight streamlined look. Pockets can be added below as desired.
  • Side compression straps are made from non-stretch Dyneema cord for squishing down the pack volume.
  • Stretchy shock cord allows you to lash things onto the ouside of the pack.
  • A detachable webbing top strap allows you to lash on extra items to the top of the pack.
  • A centrally located Hydration Port is included to string out a drinking tube over either the left or right shoulder. A water bladder can either be hung from an internal hang loop, or laid horizontally on top of your gear.
  • 2,100 Cubic inches / 35L is enough space for short, fast trips with an ultralight gear list, or for day hiking.
  • All standard Bear Canisters, including the Bearikade Expedition and the BearVault 500 will fit in the upper half of this pack standing on end.
  • All ZPacks gear has a one year warranty against defects in materials or workmanship. Returns or exchanges are welcome, even on custom gear.
  • For more info check out the Backpack FAQs.

Torso Height:
The torso height measurement on our packs is the actual distance on the backpack from the bottom of the padded belt to the top of the shoulder strap attachment. If you already own a pack that you like the fit of, measure it directly from the bottom of the belt stitching to the highest point the shoulder straps are sewn.

Otherwise you can ballpark a measurement on your body using this Torso Height Measurement graphic.

Note that some backpack models attach their straps lower down, and they rely on load lifter straps to pull the shoulder straps up over the shoulder. I personally like my straps to ride about horizontally over the top of my shoulder and I skip the load lifter straps. You may want to factor that into your measurement.

Belt Length:
There are 3 belt sizes to choose from. The indicated length is the minimum belt adjustment.

Use a string or cloth tape measure to measure tight around the spot you want your belt to ride. Don't rely on your pant size.

Our medium belt has 30" of padding tip to tip. So for example if you measure 35" you could wear a medium belt with 5 inches of gap in the front for your belt buckle. A large belt (34") might not be tight enough if you loose a little weight.

Colors: New Hybrid Colors are available! Please note that Indigo looks blue in outdoor lighting (as shown) but has a purple hue to it in indoor lighting.

There is a waiting list for this item, see the notice at the top of the page.

Don't forget to scroll down through the additional options!

Arc Slim Backpack - $230
Torso Height
Belt Length

click for larger photos.

Steve B. shares his thoughts and photos in this Arc Slim Backpack Review.
Add Options:
Backpacks are typically built right when you order with the options you specify. Returns or exchanges are always accepted, even on custom built packs.
Side Pockets
These are sized to fit 1 or 1.5 liter bottles, and are positioned low on the pack and slanted forward for easy access without removing the pack. 2 or 3 Liter platypus style bottles will also fit.

All pockets have drain holes in the bottom to drain rain water. (Roughly 135 cubic inches / 2.2L each)

Weight: .4 oz / 12 grams each   Price: $15 each

Center Pocket
A large center pocket is great for quick access items like food for the day, clothing etc. Mesh is a popular choice since you can see your gear and it lets you dry wet clothing. Mesh will hold more than a Cuben Fiber pocket since it stretches.

The dimensions of the pocket are 2" deep by 16" tall by the width of the pack you choose. Mesh stretches to about 3" deep. (Roughly 500 cubic inches / 8.2L)

Weight: .7 oz / 20 grams    Price: $15
Top Strap

A top strap is included to lash a stuff sack or other items to top of the pack. It is made from 1/2" nylon webbing with a side release clip. The strap is detachable when not in use.
Side Compression Straps
The side straps are made from Dyneema cord which does not stretch. They are used to compress down the pack volume, and can also be used to stand tall items such as trekking poles, an umbrella, or a fishing pole at the side of the pack.
Sternum Strap
A sternum strap made from 1/2" nylon webbing and a side release clip is included on your shoulder straps at chest level. It can be moved between multiple positions, and it comes off if you don't need it.
Shock Cord Lashing
3/32" Shock cord is criss-crossed along the front of the backpack. It can be used to compress the pack, or to strap on items. The shock cord can be detached when not needed.

This is included by default on the Arc Slim!

Hydration Port
A Hydration port is included by default. A drinking tube can be strung out of the pack over either shoulder. Store your water bladder horizontally on top of your gear, or hang it from a loop behind the shoulder straps.

If you do not plan to use this feature you are welcome to leave it off.

Leave Off Hydration Port

Belt Pouches
These pouches clip securely to the daisy chain on your padded belt. They have taped seams, a waterproof zipper, and are highly water resistant. Each pouch has about 1 liter of volume and is perfect for maps, snacks, hat and gloves, gadgets, you name it.

These are detachable and can be used on non-ZPacks backpacks as well. They are symmetrical and can be switched left or right.

Dimensions: About 6" wide, by 2" deep, by 5" tall.

Weight .75 oz / 21 grams each  Price: $21.95 each / $41.95 per pair
Belt Pouch Details Here
Shoulder Pouches
These clip to your shoulder straps and are an excellent spot for your camera, GPS, phone, sunglasses, or other items that you want to grab quickly. Mesh on the front of the pouch gives you additional storage for small items like chap stick, keys, etc. They can also be used for .5L water bottles to counter balance a small pack.

These are detachable and can be used on non-ZPacks backpacks as well. They are symmetrical and can be switched left or right.

Weight: .5 oz  /  14 grams each   Price: $21.95 each / $41.95 pair
Shoulder Pouch Details Here
Multi-Pack - Four in One Backpack Lid / Chest Pack / Belt Pack
This four-in-one backpack accessory can be attached to the top of your pack as a lid, carried on your chest as a front pack, or worn at your hips as a fanny pack, or carried over your shoulder as a satchel.  About 3.5 liters / 215 cubic inches volume.

2.8 ounces - 80 grams   Price: $39.95
Multi-Pack Details Here
Top Side Pockets
These pockets have a loop at each corner to connect them to corresponding loops on the sides of your pack. Since these are not sewn to the pack you can still stand tall items like trekking poles, an umbrella, or a fishing pole behind the pockets. The pockets can be taken off or added later.

The dimensions are roughly 6" wide x 3" deep x 8" tall. They are a good fit for:
-A 1 Liter or smaller pot
-A 1 Liter water bottle
-A water filter
-A poncho or light jacket
-Hat and gloves
-A NeoAir sleeping pad.

Weight: .5 oz / 14 grams each   Price: $18 each / $35 per pair
Key Pocket
A small pocket with a zipper is sewn inside the backpack just above the shoulder straps. This is a good spot to safely store your car keys and wallet until you get back to the trailhead. The pocket is located near the top of the pack so that you can access it w/o digging too far into your gear.

The pocket measures about 7" wide x 5.5" tall (18 x 14 cm).

Weight: .2 oz  /  6 grams    Price: $10
Ice Axe Loops
A pair of loops are attached at each corner of the pack for securing ice axes, one at each corner. The head of each axe secures through a loop at the bottom, the handle is kept tight at the top with a shock cord band. The loops can all come off when you aren't carrying axes.

Weight: .1 oz  /  3 grams    Price: $3
Load Lifter Straps
A pair of load lifter straps are sewn to your shoulder straps. Some people find these helpful to pull the straps up and pull the top of the pack in towards their shoulders.

Weight: .2 oz  / 5.7 grams    Price: $8

Lumbar Pad
This pad slides on or off your existing belt and is held in place by two bands of elastic on the back. It is made from gray 2.92 oz/sqyd hybrid material matching the belt.

It adds padding at your lower back and increases the air gap behind your back slightly. If your belt is just a little too large, this reduces the belt circumference by about an inch.

Weight: .6 oz  /  17 grams    Price: $12

Trekking Pole Holders
One adjustable shock cord loop is attached to your shoulder strap and another loop is attached to your belt to temporarily hold a trekking pole. These are convenient if you want to quickly stow your poles for climbing, or road walking, or other situations where you don't need your poles temporarily. You can stow them and retrieve them without stopping to remove your pack.

You can easily attach these to any older ZPacks backpacks, or other brand packs. They can be moved to either side, or you can get them on both sides.

Weight: .2 oz  /  6 grams per side    Price: $3 per side
Custom Options
If you have made special arrangements you can enter a description and amount owed in the boxes below. You can also use this box to add notes to your order, just leave the amount at $0.


Free Shipping on U.S. orders over $100!
Otherwise shipping is just $3.95 in the U.S., $15.95 Internationally and up.

Please send us an email with any questions!

Who we are:
Joe Valesko founded ZPacks in 2005. He designed and tested all the gear, and has thru-hiked over 9,600 long distance miles including the Appalachian Trail, Pacific Crest Trail, Continental Divide Trail, Te Araroa Trail, and TGOC Scotland. Joe is available to answer any questions about gear recommendations, sizing, trail info, or anything requiring an experienced opinion.

Matt Favero receives your orders, oversees production at our shop, and ships out your orders. He has hiked much of the Florida Trail, parts of the AT, and TGOC Scotland. Matt handles most routine emails about your order. We love feedback and suggestions about our gear!

Please email us for our Address if you need to send any packages. We like to know what's coming! Our Phone Number is not listed. We are able to give a more informed answer via email, and we are normally very responsive. Please email us your questions and we will reply ASAP.