Sea To Summit Womens Spark -1C/30F Down Sleeping Bag - Regular Features: 850+ FILL Power, RDS-certified, Goose Down with Ultra Dry Down treatment for improved water resistance in damp conditions. 10-Denier Nylon shell and lining. 10-Denier Nylon waterproof-breathable hood and footbox. Women's Mummy Fit: Fitted cut with generous footbox and technical hood, to maximise thermal efficiency and minimise bulk and weight. Wider at the hips and narrower at the shoulders for a better fit and heat retention for women. Spark Women's 7C & 1C Primary zip - 1/2 length #5 with zip-plow and two sliders. Spark Women's -9C Primary zip - 3/4 length #5 with zip-plow and two sliders. Spark Women's 7C Vertical chest baffles, horizontal baffles lower half and base, sewn through quilted construction throughout. Spark Women's -1C Vertical chest baffles, horizontal baffles lower half and base, box wall baffles top half of bag and sewn through quilted construction lower half. Spark Women's -9C Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout. QuiltLock Pairing with unisex Sea to Summit bags, the QuiltLock system and drawcord footbox enables quilts to be secured to sleeping bags for added functionality and freedom.   Womens Spark -1C/30F Down Sleeping Bag - Regular