Sea to Summit Flame Ultralight Women's Sleeping Bag 15

The Flame Ultralight Women's Sleeping Bag 15 is Sea to Summit's women's-specific cold-weather mummy bag, rated to a limit temperature of -10°C (about 15°F) with a comfort rating of -4°C, tested to EN/ISO 23537. Warmth comes from 650 g of 850-fill-power RDS-certified goose down in a 90/10 down-to-feather blend, treated with the PFC-free ULTRA-DRY hydrophobic finish that helps the fill keep its loft in damp conditions. At 890 g total it sits toward the heavier end of ultralight for its temperature class, a trade-off for the wider-hip, narrower-shoulder cut built for the female form and for extras such as the fitted, contoured hood and draft collar that seal cold air away from the neck. The full-length, right-side zipper and 10D nylon shell keep shell weight modest, while a 7D liner adds next-to-skin comfort, and both a stuff sack and storage sack are included. Suited to shoulder-season and winter trips for users up to 170 cm tall, this bag targets women who want genuine cold-weather margin without moving up to a heavier expedition bag.