Maker’s warranty: Limited lifetime warranty against defects in materials or workmanship; covers original owner, bought from Sea to Summit or an authorized reseller; paid repairs; spare parts sold. Sea to Summit’s terms, read Oct 25, 2026
A 22-liter waterproof daypack from Sea to Summit in siliconized, non-PFC, bluesign-approved CORDURA fabric. It folds into its own attached stuff sack, which carries a carabiner key ring. Sea to Summit lists a packed weight of 110 g (3.9 oz).
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 →
88% lighter than the category average.
Against every one of the backpacks in the RidgeNote register with a published figure. Manufacturer-listed; sources and dates are on this page.
The lightest of the 16–28 L backpacks on record is Sea to Summit Ultra-Sil Daypack at 2.5 oz — 38 g less and $20 less.
The cheapest is Gossamer Gear RikSak at $45.00 — $25 less and 29 g heavier.
Main models on the same shelf, compared with the Ultra-Sil Dry Daypack on the makers’ published figures; the tick on each bar is the Ultra-Sil Dry Daypack.
Nothing on record is roomier than the Sea to Summit Ultra-Sil Dry Daypack among 15–29 L backpacks.
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.
