Sea to Summit Ascent Down Sleeping Bag

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. All of the above make the Ascent a true three-season backcountry bag, one of very few on the market. Close the snaps at the shoulders, open the footbox zipper and wear the Ascent at camp - hardcore adventures don't have to be hard all the time.


  • 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


-1°C Regular -1°C Long -9°C Regular -9°C Long
Bag Weight 782g 897g 1020g 1157g
Compressed Volume 5.5 L 6.4 L 7.5 L 8.0 L
Compression Sack 8 L 8 L 13 L 13 L
Fill Weight 300 g 343 g 540 g 617 g
Fits Up To Height 185 cm 198 cm 185 cm 198 cm
Temperature Rating (ISO Lower Limit) -1°C -1°C -9°C -9°C
Women's Temp Rating (ISO Comfort) 3°C 3°C -2°C -2°C

Collections: Sea to Summit, Sleeping, Sleeping Bags

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