Drift 20L Daypack
A minimalist daypack for summit pushes, city travel and carry-on flights.
$14911 oz
- Up to 15 lb load
- Roll-top waterproof closure
- Fits airline carry-on limits
Ultralight gear, since 2019
Ultralight Hiking Backpacks That Weigh Under 1 lb
Antigravity packs carry up to 30 lb of gear yet weigh less than a water bottle. Waterproof, trail-tested and built to last a lifetime.
- 11–16 oztotal pack weight
- 30 lbmax comfortable load
- 100%waterproof fabric
- Lifetimewarranty
Choose Your Ultralight Backpack
Three sizes for day hikes, weekend trips and thru-hikes. Same featherweight build, same lifetime warranty.
Orbit 35L Hiking Pack
Our best seller for overnight and weekend backpacking trips.
$22914 oz
- Up to 25 lb load
- Removable padded hip belt
- Stretch mesh front pocket
Apex 50L Thru-Hiker
Built for the Appalachian, Pacific Crest and Continental Divide trails.
$32915.8 oz
- Up to 30 lb load
- Removable carbon stay frame
- Bear canister compatible
How We Make Backpacks So Light
Every gram is questioned. If a part doesn't earn its weight, it doesn't make the pack.
01
Dyneema Composite Fabric
Up to 15× stronger than steel by weight, fully waterproof and it doesn't absorb water, so your pack never gets heavier in the rain.
02
Bonded, Taped Seams
Heat-bonded seams replace heavy stitching, removing weight and the tiny holes where water gets in.
03
Carbon Stay Frame
A 1.2 oz carbon stay transfers load to your hips, then slides out when you want to go even lighter.
Trusted by Thru-Hikers
"Carried the Apex 50L for 2,650 miles on the PCT. Still waterproof, zero holes. Base weight dropped by almost 2 lb."
"The Orbit is the first ultralight pack that's actually comfortable with a full food carry. The hip belt makes all the difference."
"I use the Drift as my only bag for work trips. Fits under the seat and weighs nothing."
Ultralight Backpack FAQ
How can a backpack weigh under 1 lb and still be durable?
We use Dyneema composite fabric, which is up to 15 times stronger than steel by weight, plus bonded seams instead of heavy stitching and a removable carbon stay frame.
Are Antigravity backpacks waterproof?
The fabric is fully waterproof and all main seams are taped. The roll-top closure keeps rain out, so no separate pack cover is needed.
How much weight can an ultralight backpack carry?
The Drift 20L is designed for up to 15 lb, the Orbit 35L for up to 25 lb and the Apex 50L for up to 30 lb while staying comfortable.
Is the backpack allowed as airline carry-on?
Yes. The Drift 20L and Orbit 35L fit the carry-on size limits of most US and European airlines.
What warranty and return policy do you offer?
Every pack has a lifetime warranty against manufacturing defects, free US shipping and a 60-day trail-tested return policy.
Carry More. Feel Nothing.
Free US shipping, 60-day trail-tested returns and a lifetime warranty on every Antigravity pack.