Outdoors Gear Guides — Updated for 2026
Comparison

Best Ultralight Backpacks for 2026

Shaving pack weight is the fastest way to hike farther and feel better at camp. We tested frameless and minimalist packs to find the ones that carry well.

Hiker with ultralight pack on mountain ridge
Best Overall
1. Osprey Exos 48$220
★★★★★4.7 out of 5 · 4,800 ratings
Osprey Exos 48
AirSpeed suspension breathes well, internal frame transfers load nicely
What we don't: Not truly ultralight at 2 lb 9 oz

The Exos 48 splits the difference between comfort and weight. The tensioned mesh back panel keeps you cool and the hipbelt actually carries load. An ideal 3-season pack.

Best Minimalist
2. Gossamer Gear Gorilla 40$275
★★★★★4.6 out of 5 · 890 ratings
Gossamer Gear Gorilla 40
Under 1 lb 14 oz, carries surprisingly well for a frameless pack
What we don't: Hip belt pockets cost extra

GG's Gorilla is the favorite frameless pack of serious thru-hikers. A removable sit pad doubles as a frame sheet. It rewards careful packing and pays off on long miles.

Best for Thru-Hiking
3. ULA Circuit$235
★★★★★4.8 out of 5 · 1,200 ratings
ULA Circuit
Bombproof build quality, thoughtful pockets
What we don't: Heavier than frameless options at 2 lb 5 oz

The ULA Circuit has earned near-cult status on the PCT and AT. The construction outlasts the rest of your gear, side pockets swallow a 1-liter bottle easily.

Best Budget
4. REI Co-op Flash 45$160
★★★★☆4.5 out of 5 · 2,100 ratings
REI Co-op Flash 45
Great value, comfortable carry, lots of organization
What we don't: Heavier than competitors at 2 lb 13 oz

REI's Flash 45 gives you a comfortable, well-organized ultralight-leaning pack at a price that won't hurt. A smart choice for weekend warriors going lighter.

Best All-Weather
5. Hyperlite Mountain Gear Windrider 40$375
★★★★★4.8 out of 5 · 650 ratings
Hyperlite Mountain Gear Windrider 40
Waterproof Dyneema shell, bomber construction
What we don't: Premium price, no hipbelt pockets

Hyperlite's Dyneema Composite Fabric packs are essentially waterproof, ultralight, and indestructible. The Windrider 40 at 1 lb 11 oz is their sweet spot.

Buying Guide

Frameless vs. Internal Frame

Frameless packs (under 1 lb 8 oz) require careful packing — your sleeping pad provides structure. Internal frame ultralight packs are more forgiving with heavier loads. For loads over 25 lbs, choose an internal frame.

Fit First

An ultralight pack that doesn't fit will destroy your hike. Most cottage brands offer limited torso length options, so measure your torso from C7 vertebra to iliac crest before ordering.

Volume: How Much Do You Need?

For a 3-season weekend (2 nights), 35–45L is typically enough. Thru-hikers between resupplies often go 50–60L. When in doubt, go smaller — it forces you to pack lighter.

Frequently Asked Questions

What's considered truly ultralight?

The ultralight community defines base weight under 10 lbs as 'lightweight' and under 5 lbs as 'ultralight.' Your pack is part of that base weight, so it matters.

Are frameless packs comfortable?

With a load under 20 lbs and careful packing technique, yes. Over 20 lbs, a minimal internal frame makes a real difference in hip transfer.

See also: Best Hiking DaypacksBest Hydration PacksBest Backpacking Gear

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