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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™ Blast Backpacks


This listing is outdated. You can still order this item by ordering an Arc Blast, and leave off the frame.

The "Blast" packs are frameless and can utilize a coiled or folded foam sleeping pad for support. The design has been updated, these are now exactly like our Arc Blast, except without the frame.

The pack is constructed from tough 2.92 oz/sqyd Cuben Hybrid fabric. This material is Cuben Fiber on the inside with a protective layer of 50 denier Polyester on the outside. The outer layer gives it even more strength, prevents fraying, and gives it a nice solid color. The Hybrid Cuben Fiber material can handle 30lbs without a problem, but frameless packs are generally only comfortable up to about 20lbs (9 kg).

I carried an original Blast 30 pack on both my 2,663 mile Pacific Crest Trail thru-hike, and on my 2,651 mile Continental Divide Trail thru-hike. The new packs are made with 2.92 oz/sqyd Hybrid Cuben Fiber which is even stronger than the original 1.43 oz/sqyd Blast packs.

There are three pack volumes to choose from. The torso height and belt size choices are independent of the pack volume.

45L Pack Size:

Total Volume: 45 Liters / 2,750 cubic inches - 12.5 ounces (354 grams), $235
Body dimensions: 5.5" x 12.5" x 30"  (14 cm x 31.8 cm x 76 cm)

52L Pack Size:

Total Volume: 52 Liters / 3,200 cubic inches - 13.0 ounces (369 grams), $239
Body dimensions: 6.5" x 12.5" x 30"  (16.5 cm x 31.8 cm x 76 cm)

60L Pack Size:
Total Volume: 60 Liters / 3,650 cubic inches - 13.5 ounces (382 grams), $249
Body dimensions: 7.5" x 12.5" x 30"  (19 cm x 31.8 cm x 76 cm)

The side pockets account for 5 Liters / 300 cubic inches and the mesh center pocket is 8 Liters / 500 cubic inches, and are included in the total volume.

Standard Features on the Blast backpacks:

  • Lightweight, frameless design allows you to use your foam sleeping pad as both padding and an internal frame. Just coil it inside the backpack and pack your gear into the center. Frameless backpacks like these are generally comfortable for loads up to 20 lbs / 9 kg, but the material can handle a more weight.
  • Roll top closure (like our dry bags) keeps water out, and lets you roll down the top as your gear load shrinks.  New!  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.
  • 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.
  • 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-stretch Dyneema cord for squishing down the pack volume. They also allow you to stand tall items like trekking poles in the side pockets.
  • A top strap, and base straps allow you to lash on extra items to the top or base of the pack. The straps come off if you don't need them.
  • 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.
  • Roughly 3,200 cubic inch (52 Liter) volume is enough for extended trips. The pack can be compressed down with the roll top and side straps for short trips, or use the top strap and base straps to lash extra stuff to to the outside for long carries.
  • All standard Bear Canisters, including the Bearikade Expedition and the BearVault 500 will fit in this pack standing on end. There is enough extra girth to either wrap a foam pad around the canister (if you use one), or stand a Medium stuff sack vertically beside the bear canister.
  • 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 straps.

Check this Torso Height Measurement graphic to see how to measure.

The default / medium torso height on this pack will fit a 20" to 21" torso as measured. Taller and shorter torso heights can be selected.

Belt Length:
There are 3 size belts to choose from. Choose the largest belt that will fit you. For example if your measurement where your belt will ride is 31" around, you would choose Medium (30 inches and up).

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!

This listing is outdated. You can still order this item by ordering an Arc Blast, and leave off the frame.

Click for full size images
White, Black, Army Green

In 2007 I carried an original Blast 30 backpack on a full PCT thru-hike (2,663 miles). I carried a base weight of around 5 lbs (PCT gear list), and generally 12-20 lbs with full food and water.

At one point I carried 35 lbs for an 11 day stretch without re-supply through the High Sierras of California. My shoulders weren't happy about that much weight, but the pack took it like a champ! (Under 20 lbs is a more comfortable weight with frameless packs)

By the end of the five month trip the pack was quite a bit frayed and beat up, but still in very usable condition.

The updated Blast backpacks are made from stronger 2.92 oz/sqyd Hybrid Cuben and will hold up even longer without the fraying I encountered in 2007. If I were to do those trails again I would carry an Arc Blast, the frame is worth the extra weight on a long trip.
-Joe Valesko

I just want to drop you a quick line to let you know how thrilled I was using your backpack on my Philmont 12 day 100mile backpacking trek. My pack held up PERFECTLY! It kept ALL of my items in the pack completely dry during a 13 hour hike in a heavy rainstorm. Originally, the other hikers commented on how I needed to buy a sturdy pack because mine would not hold up to the rigors of the trek. I just smiled knowing how little my pack weighed. Boy were they WRONG! My frameless pack was comfortable and durable. I highly recommend anyone who wants to hike on a trek to loose the added weight and use one of your packs. Thanks again"
-Keith T.

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.
Top Strap

A top strap is included to lash a stuff sack or other items to the pack above the center pocket. It is made from 1/2" nylon webbing with a side release clip. The strap is detachable when not in use.
Base Straps

A pair of straps are included to lash a foam pad or other item to the base of the pack below the center pocket. The cords can be taken off.
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.

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. These have taped seams and are completely waterproof from falling rain. They open with a single clip at the center. 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: $19.95 each / $38 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
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. It does get in the way of the center pocket a bit.

Weight: .5 oz  /  14 grams    Price: $6
Ice Axe Loops
A pair of loops are tied on at each side of the pack for securing one or two 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 top of the pack in towards their shoulders.

Weight: .2 oz  / 5.7 grams    Price: $8
Sleeping Pad Holsters
These triangular holsters allow you to store a folded sleeping pad or sit pad against your back for padding. Keeping your pad outside the pack frees up pack real estate inside your pack and allows you to remove your pad on breaks.

These are attached with adjustable elastic bands and will fit just about any pad. A Gossamer Gear Nightlight Torso Pad is shown. The holsters are detachable.

Weight: .5 oz  /  14 grams    Price: $15 per pair.
Sleeping Pad Shock Cord
Loops and shock cord are added to your pack to lash on a sit pad or sleeping pad against your back. This is an alternative to the holsters above.

Weight: .2 oz  /  6 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

Roll Top Dry Bags
Up to 6 size medium roll top bags will fit inside the body of the pack, and up to 3 more can be strapped on to the top and bottom of the pack for long carries. That's alot of capacity! Put your heaviest items (food, water) on the inside of the pack, and lightweight items (tent, clothes, pad) on the outside if you run out of internal space. The Large Rectangle food bag size is a good fit for this pack.

Roll Top Dry Bags

A medium cuben fiber Pack Cover, or a Pack Liner are also sized for this pack.
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.