Sea to Summit Ember Ultralight Down Quilt 35

The Sea to Summit Ember Ultralight Down Quilt 35 sits toward the milder end of the Ember quilt lineup, rated to a 2°C comfort temperature (limit -4°C) and built for three-season backpacking rather than deep winter. Fill is 350 g of 850+ fill-power RDS-certified goose down with the same hydrophobic, non-PFAS Ultra-Dry treatment used across the range, held in place by horizontally oriented baffles. In regular size (183 cm internal length, 119 cm shoulder width tapering to 86 cm at the feet) it weighs 600 g and packs down to 4.9 litres, giving a warmth-to-weight ratio of 6.7 — noticeably less efficient gram-for-gram than the warmer-rated Ember 25 in this lineup, since a thinner fill carries a higher weight-per-degree cost. The shell uses 10D recycled nylon over a 7D nylon liner, and QuiltLock-compatible pad straps let it attach to a sleeping pad or pair with a compatible Sea to Summit sleeping bag. It's a reasonable middle-ground pick for hikers who want quilt weight savings without pushing into marginal cold-rated territory.