Best Ultralight Backpacks of 2026
Gear research & fact-checking
An ultralight pack only works if the rest of your kit is light enough that you don't need the heavy suspension you just deleted. These picks are ranked by weight, but screened for whether they still carry a realistic multi-day load without collapsing onto your shoulders.
What to look for in ultralight backpacks
- ▸Sub-1.2 kg empty weight
- ▸Enough frame/structure to carry ~12 kg comfortably
- ▸Removable lids/straps to trim more weight
- ▸Durable enough fabric to survive off-trail use
The picks, ranked
REI Co-op Flash 55
REI
Why it's here: At 1.05 kg it's the lightest here that still carries a real load.
The REI Co-op Flash 55 is one of the best ultralight backpacking packs for the money. At 2 lbs 5 oz and $199, it delivers impressive performance for weight-conscious hikers who do not want to spend $300+ on a cottage-brand pack.
Osprey Atmos AG 65
Osprey
Why it's here: At 2.04 kg it's the lightest here that still carries a real load.
The Osprey Atmos AG 65 remains one of the best all-around backpacking packs you can buy. Its AntiGravity suspension system delivers class-leading comfort, ventilation is excellent, and the organization options are well thought out for multi-day adventures.
Gregory Baltoro 65
Gregory
Why it's here: At 2.15 kg it's the lightest here that still carries a real load.
The Gregory Baltoro 65 is the premier choice for backpackers who regularly carry heavy loads of 35 pounds and above. Its Response AFS suspension system adapts dynamically to body movement, transferring weight with exceptional efficiency and making demanding terrain feel manageable even under expedition-weight loads.
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Frequently asked questions
How light is an ultralight backpack?
Generally under ~1.2 kg empty for a 50–60 L pack. The catch: most ultralight packs carry comfortably only up to ~12–14 kg total, so your base weight has to be low for the math to work.