Maker’s warranty: Limited warranty against manufacturing or material defect for the lifetime of the product; electronics up to two years; covers bought from an authorized Big Agnes retailer or direct; repair center; repair parts sold. Big Agnes’s terms, read Oct 25, 2026
A 28-liter daypack from Big Agnes with running-vest-style shoulder straps and an adjustable suspension, made of recycled nylon derived from discarded fishing nets. Two torso sizes cover 15 to 21 in (38 to 53 cm).
Figures with a source link to the page they were read from, with the date we checked it.How we get these figures →Wrong figure? Tell us
Packs are sized by torso length, not height. How to measure yours →
Weight and price against the backpacks of 20–36 L in the RidgeNote register with a published figure; other figures against every one of the backpacks. Manufacturer-listed; sources and dates are on this page.
The lightest of the 20–36 L backpacks on record is Gossamer Gear Murmur 36 Hyperlight Backpack (Aluula) at 7.9 oz — 597 g less for $120 more.
The cheapest is Gossamer Gear Vagabond Jet at $130.00 — $100 less and 128 g lighter.
Main models on the same shelf, compared with the Sweetwater UL 28L on the makers’ published figures; the tick on each bar is the Sweetwater UL 28L.
ULA Equipment
30L Patchless Robic Dragonfly
2.7 oz lighter (77 g)
$10 more
ULA Equipment
30L Robic Dragonfly
2.7 oz lighter (77 g)
$10 more
Hyperlite Mountain Gear
Daybreak 22
9.8 oz lighter (278 g)
$10 more
Not ranked: 20 with no published volume, 1 with no published weight.
See all 21 →
Big Agnes
Causeway 28L
$30 less
3.0 oz heavier (85 g)
Gossamer Gear
Vagabond Jet
$100 less
4.5 oz lighter (128 g)
Gossamer Gear
Aero Jet
$4.95 less
6.8 oz heavier (194 g)
Not ranked: 16 with no published volume, 9 with no published list price.
See all 16 →
ULA Equipment
30L Patchless Ultra Dragonfly
2 L more
1.6 oz lighter (45 g) · $60 more
Hyperlite Mountain Gear
Aspect 32
4 L more
1.7 oz lighter (48 g) · $140 more
ULA Equipment
36L Patchless Ultra Dragonfly
8 L more
2.0 oz heavier (57 g) · $90 more
Not ranked: 21 with no published volume.
See all 21 →Ultralight backpacks ranked by maker-published weight: 40 models. Lightest: Gossamer Gear Murmur 36 Hyperlight Backpack (Aluula) at 7.9 oz (225 g).
Six backpacking packs from 45 to 68 L: how to fit one, then their published volume, frame, load range, weight and list price, with a reason to skip each.