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 20-liter daypack from Sea to Summit in 30D siliconized CORDURA, with bar-tacked stress points and non-padded straps, that packs into an attached stuff sack about the size of a tennis ball. Sea to Summit lists a packed weight of 72 g.
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 →
92% 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 cheapest of the 14–26 L backpacks is Gossamer Gear RikSak at $45.00 — $4.95 less and 67 g heavier.
Main models on the same shelf, compared with the Ultra-Sil Daypack on the makers’ published figures; the tick on each bar is the Ultra-Sil Daypack.
Nothing on record is lighter than the Sea to Summit Ultra-Sil Daypack among 14–26 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.
