The Sea to Summit Ascent Women's sleeping bag is ideal for a wide range of climates, conditions, and activities. With its ultra lightweight 750+ FILL Power and Free Flow Zip System, this sleeping bag offers both warmth in cooler conditions and ventilation in warmer ones. Versatile and comfortable, it's the perfect choice for any adventure. Features RDS-certified, 750+ fillpower goose down with a non-PFC Ultra-Dry Down treatment to stay drier in damp conditions Free-Flow Zip System offers excellent temperature regulation and multiple sleeping bag configurations Thermally-efficient, more relaxed mummy fit, room in the hood to fit an Aeros pillow and the option to zip couple with a compatible Sea to Summit Women's bag to deliver space for two comes standard Lightweight 20D recycled nylon shell with a non-PFC DWR finish to protect against wind and moisture and a 20D recycled nylon liner for greater comfort Box baffle construction throughout with vertical baffles in the torso to minimize down shift and maximize the retention of warmth Sea to Summit Guarantee is offered for the Lifetime of this product Specifications Insulation: 750+ FILL Power, RDScertified, Goose Down with Ultra Dry Down treatment for improved water resistance in damp conditions Fabric: Recycled 20-Denier Nylon shell and lining. 10-Denier Nylon waterproof-breathable hood and footbox. Women's Relaxed Mummy Fit: A more relaxed yet tapered mummy fit with high thermal performance. Wider at the hips and narrower at the shoulders for a better fit and heat retention for women. Zip: Free Flow Zipper System that offers temperature regulation and multiple sleeping bag configurations for added freedom in the outdoors. Comes With:  Ultra-Sil™ Compression Bag & Storage Cell The temperature rating on Women's specific sleeping bags is based on a Comfort Rating. All other sleeping bags are based on a Lower Limit.  Max User Height Weight Fill Weight Compressed Volume Ascent -1°C Women's Regular 170cm 893g 459g 6.8L Ascent -1°C Women's Long 185cm 1002g 520g 7.7L Ascent -9°C Women's Regular 170cm 1251g 797g 9.8L Ascent -9°C Women's Long 185cm 1403g 900g 10.9L