The Arc Blast is our most comfortable (and our most popular) backpack yet!
Our Patent Pending Flexed Arc carbon fiber frame creates an air gap
against your back. The air space keeps your back cool and also
provides a buffer from any lumpy items in your pack. The curve of
the frame is adjustable for optimal air flow and fit. No extra
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 material and design can handle loads up to 30 lbs (14 kg).
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 - 16.0 ounces
(454 grams), $275
Main Body Volume: About 32 Liters / 2,000 cubic inches
Body dimensions: 5.5" x 12.5" x 30" (14 cm x 31.8 cm x 76 cm)
52L Pack Size (the original default size):
Total Volume: 52 Liters / 3,200 cubic inches - 16.5 ounces (468 grams), $279
Main Body Volume: About 39 Liters / 2,400 cubic inches
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 - 17.0 ounces (482 grams), $289
Main Body Volume: About 47 Liters / 2,850 cubic inches
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
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 now has two
horizontal support bars instead of one, 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, making the pack highly water resistant.
We still suggest using dry bags for your important items like your
- Comfy 3/8" thick by 2.5" wide padded contoured shoulder straps and padded
Both the straps and the belt have a daisy chain for clipping on
items, and an adjustable position sternum strap is also
- 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
- 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
- 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
- The default pack size has roughly 52 Liters / 3,200 cubic
inches of volume which 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 the upper half of
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
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
There are 3 belt sizes to choose from. The indicated length is the minimum belt
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
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
Don't forget to scroll down through the additional options!
Backpacks are typically built right when you order with the options you
Returns or exchanges are always accepted, even on custom built packs.
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.
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
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.
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 to
any position on the straps, and it comes off if you don't need it.
The default material for this backpack is 2.92 oz/sqyd Hybrid Cuben
We also have 4.8 oz/sqyd Dyneema X Gridstop material available. It is
a bit stronger and more resistant to abrasion. It adds about 3 ounces
(85 grams) to the weight of the backpack. We have it in Black as
You can choose this from the color drop down above.
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
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
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
Weight: 2.8 ounces - 80 grams Price: $39.95
Multi-Pack Details Here
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
If you do not plan to use this feature you are welcome to leave it
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
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
click for larger photos.
CleverHiker Top Pick!
Read the Full
Arc Blast Review at CleverHiker.com
Will Wood gives a Post-Appalachian Trail Thru-hike
Video Review of his Arc
Blast backpack after 7 months of use.
Adventure Writer Keith "Fozzie" Foskett reports from his 2013 El Camino
de Santiago thru-hike with his Arc Blast!
Read his informative review with photos.
Update- Keith has finished his second El Camino de Santiago hike in 2014. "My
now has 1900 Miles on the clock and it barely seems worn in."
"On the impressiveness scale, I would put the load carrying abilities of the
ZPacks Arc Blast, for loads in the sub 20 range, at exceptional."
Check out the full
Review by John Abela (Hikelighter.com)
Angiosperm shares his thoughts and photos in his
60L Arc Blast Review
Matt D. reviews his Arc Blast
Backpack and his Hexamid Solo-Plus tent and poncho.
2012 PCT Hiker Spider Legs reviews his first generation Arc Blast Backack.
"The Tour De Mont Blanc was amazing! The Arc Blast did exceptionally well carrying
all of my gear and food for 8 days of travel through the French, Italian, and
Swiss Alps!" -Ben Smith (Goosefeetgear.com)
"I just wanted to let you know that I received the pack today. I had extremely
high and unfair expectations from the reviews and recommendations I had
received, which the Arc Blast has (somehow) more than surpassed! This is my
first ZPacks product and I am just blown away by the craftsmanship and
I was expecting some imperfections from a smaller company, but the stitching
and the water taped seams are just beautifully done, as is the rest of the
pack. On top of all that, I just loaded it up with a lot extra gear and the
weight transfer is unbelievable, couldn't really tell the difference between 1
pound and 15 pounds." -Rocky J.
"Got back from my Sequoia adventure with the Arc Blast pack. I was a little
apprehensive, I didn’t think a one pound pack would handle 35 pounds, expedition
canister with food for 9 days included. We weighed them with scales before
heading off to trail. At that point I was committed and thought “oh boy”….
I must say this was the most comfortable pack I’ve ever used. And I’ve used ULA,
Six moons, and granite gear stuff. Pleasant surprise!" -Chuck T.
"Thanks for the Arc Blast. We loved it. Best, and lightest of the breed. We used
it for four days and three nights through about 32 miles and 6000ft of up and
down , rain, sleet, hail, and snow without any fault or discomfort. Also,
survived six airplane rides and several mad dashes through the airport with a
full load. I'm sure this is nothing compared to what others have done with the
pack." -Arlo A.
"I have been using the 60 liter Arc Blast backpack I purchased from you for a
couple months now. I love the pack and I think it's the most perfect designed
and constructed pack to be found anywhere. I have shown the pack to lots of
hikers and recommended it to everyone." -Chuck F.
"Your products have changed my life. I went on the most comfortable backpacking
trip of my life last weekend using the Arc Blast, sleeping bag, hood,
toothbrush, towels, just about everything you sell, haha. Thanks so much for the
wonderful products and your amazing customer service, I will be singing your
praises up and down the PCT this summer." -Otto R.
"Alyson & I can’t thank you enough for how much we enjoyed the zPacks gear
during our recent walk in Spain. It’s not just the light weight – the Arc Blast
packs are so well designed we just put our gear in and everything was so easy to
access when we needed it." -Mark & Alyson
"The backpack was comfortable and survived the harsh environment on the
Larapinta Trail in Australia. One of the most comfortable packs I have used.
Just large enough for 10 days gear and dehydrated food, three litres of water
and SLR camera. Start weight about 17kg."
"Just completed the GR-5 last week in France. The
pack was fantastic,
easily carrying 10 kgs, completely water resistant through every thunder storm,
and unbelievably light. Thanks for a great piece of gear." -Avi. (photo)
"I seem to have (inadvertently) got the JMT southbound record time 4 days, 8
hours, 43 minutes. I used a lot of ZPacks kit on this trip - Arc Blast pack,
Hexamid tarp, ZPacks sleeping bag, WPB rain jacket and kilt." -Ralph Burgess
I am not a super-light hiker but an older guy incrementally dropping
weight. I was surprised how comfortable the Arc Blast was. I expected to "give
something up" in order to drop weight. Not the case with the Arc Blast! -Doug L.
"The pack is great! 6 days in the Grand Canyon loaded with water, 8 days
bushwhacking in the Wind Rivers, 6 days on the AT, all loaded for the duration.
Carries far more weight than you rate it for and does so well ... it's a
beautiful thing and my favorite of all my packs!" -Bob M.
"The Arc Blast I got some time ago worked great at Philmont this summer, even
when hauling up to 50lbs. The Scouts still haven't learned anything about light
weight food, so we had plenty of canned goods and gallons of water due to the
drought. The pack was uber comfortable, even under such heavy loads. Love your
gear!" -Daniel L.
Disclaimer: You probably should not carry 50lbs in this pack, but it is nice to
know that you could in extreme circumstances. 30-35lbs is a more reasonable
"I just returned from a 10-day trip in the Sawtooth Wilderness in Idaho. The Arc
Blast pack was wonderful. It is the best backpack that I have ever owned. Thank
you for lightening my load by approximately 2 pounds from last year's trip!"
"I used the Arc Blast on my recent JMT thru hike. The pack performed perfectly!
It was super comfortable even with 7 days food in my 12" Bearikade (about 31 lbs
total weight) and shows no visible wear and tear. I actually saw several other
hikers with the same pack and 100% of the people who had them loved them! I put
the Bear can in the middle of the pack to avoid any potential wear and
tear on the bottom, and the weight distribution was great." -Mick P.
"Thank you for quickly sending out my new backpack to Reds Meadows. My old pack
was falling apart and I was able to complete the John Muir Trail without
interruption. The Arc Blast fits perfectly and was a joy to carry. Many people
asked about it and we gave them your website! The Hexamid solo is still working
wonderfully after 3700 miles too! Hope you continue to have great success with
your business." -Jellybean
"I just finished a JMT thru-hike with a 60L Arc Blast and a Hexamid Duplex, and
they both worked fantastically. The pack held my BearVault 500 with a peak
weight of about 25 lbs without problem, and it still looks in good shape!"
"This year I was trekking in the French Alps and found Arc Blast just fantastic!
It sits very well on your body, I could easily adjust the frame to regulate the
distance between the pack and my back, size and placement of the side pockets is
very good, my drink bottles and small snacks were very safe there. I felt like
backpack was very well 'united' with my body. We were trekking through some
difficult terrain and it was very comfortable, I'm really impressed. I did get
some tiny scuffs on the bottom from resting it on sharp rocks, but other than
that it is great. I'm so glad my friend told me of your website." -Ewa K.
"Just wanted to send a quick thanks for my Arc Blast! I have been absolutely
loving it and giving it a workout. Best pack I have ever owned. Here's a view of
the Chinese Wall
in The Bob Marshall Wilderness." -Will F.
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:
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:
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
Weight: .2 oz / 5.7 grams Price:
Shock Cord Lashing
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
Weight: .5 oz / 14 grams Price:
This pad slides on or off your existing belt and is held in place by
two bands on the back. It is also tied in place at the center so that
it can't ride up or down. This may not fit on non-ZPacks backpacks.
It is made from 2.92 oz/sqyd hybrid
material matching the pack's 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:
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
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
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.
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