Sea to Summit Altitude Women's Down Sleeping Bag 15

The Sea to Summit Altitude Women's Down Sleeping Bag 15 is a winter bag built specifically around female anatomy rather than simply scaled down from a men's pattern. A wider hip section and a shorter maximum user height (170 cm) reflect typical proportional differences and are meant to remove dead air space that would otherwise waste warmth. Tested to EN 13537, it carries a comfort rating of -10°C and a limit of -17°C, placing it in the 4-season winter category. The 720 g fill of 750-fill-power duck down is hydrophobic-treated and RDS-certified; a 20D nylon shell keeps total weight at 1,280 g, working out to roughly 75 g per degree — an average figure among winter bags. The triple-zip Free-Flow system regulates ventilation without fully opening the bag, and coupleable construction lets it pair with a compatible bag to form a double sleeping system. A contoured hood plus draft collar and tube seal in warmth at the usual heat-loss points. Suited to winter trekking and cold multi-day trips where a properly fitted cut matters.