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 roomy synthetic sleeping bag from Sea to Summit rated 30°F / -1°C (ISO 23537 lower limit). A full-length zip with two sliders vents it or opens it flat for use as a quilt.
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
Weight and price against the sleeping bags & quilts rated 20°F to 40°F in the RidgeNote register with a published figure; other figures against every one of the sleeping bags & quilts. Manufacturer-listed; sources and dates are on this page.
The lightest of the sleeping bags & quilts rated 20°F to 40°F on record is Zpacks Solo Quilt at 11.8 oz — 892 g less.
Main models on the same shelf, compared with the Boab Synthetic Sleeping Bag on the makers’ published figures; the tick on each bar is the Boab Synthetic Sleeping Bag.
Sea to Summit
Hamelin Synthetic Sleeping Bag
3.6 oz lighter (103 g)
$52 more
Kelty
Cosmic Down 20 Sleeping Bag
4.3 oz lighter (121 g)
$66 more
Sea to Summit
Spark Women's Down Sleeping Bag
1.86 lb lighter (845 g)
$225 more
Not ranked: 25 with no published weight.
See all 39 →Nothing on record is cheaper than the Sea to Summit Boab Synthetic Sleeping Bag among sleeping bags & quilts.
Not ranked: 59 with no published list price.
Sea to Summit
Trek Women's Down Sleeping Bag
rated 18°F warmer
0.4 oz heavier (12 g) · $240 more
Western Mountaineering
Kodiak MF
rated 30°F warmer
0.6 oz heavier (18 g)
Stone Glacier
Chilkoot 0°
rated 30°F warmer
1.3 oz lighter (36 g) · $575 more
Not ranked: 25 with no published temperature rating.
See all 37 →Sleeping bags and quilts rated 26 to 35°F ranked by maker-published weight: 16 models. Lightest: Zpacks Solo Quilt at 11.8 oz (335 g). Median 1.39 lb.
Sleeping bags rated 15 to 25°F ranked by maker-published weight: 22 models. Lightest: Therm-a-Rest Vesper 20°F/-6°C Down Quilt at 1.21 lb (550 g).
How to read a temperature rating, why fill weight matters more than fill power, per-size prices, and what the makers publish for the Kelty Cosmic 20, the Western Mountaineering line, NEMO, Sea to Summit, Mountain Hardwear and Therm-a-Rest.