Our most versatile sleeping bag available. In colder temperatures you can cinch down the technical hood, zip up the draft-tube protected zippers and allow the 750+ Ultra-Dry Goose Down to keep you warm. In warmer conditions, the Free-Flow Zip system lets you unzip in different configurations for superior ventilation and even open up flat to turn the Ascent sleeping bag into a quilt on the warmest of nights.

Design and Details:

• Technical warmth-retaining construction and high-lofting down, room to sleep comfortably, and unmatched ventilation make the Ascent sleeping bag an incredibly versatile backcountry bag
• RDS-certified, 750+ fillpower goose down with a non-PFAS 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-PFAS 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