Sea to Summit Basecamp™ 20 Sleeping Bag

WaveLoft™ Construction: WaveLoft™ is a unique construction technology designed to maximize loft and minimalize insulation weight. Instead of conventional flat layers of insulation (sewn flat on top of each other) or shingle layers (sewn in diagonally overlapping layers), WaveLoft™ creates curved layers which expand out from the shell to trap the greatest amount of air possible at a lower overall weight than existing synthetic insulation constructions.

Thermolite HL-1: HL-1 high loft insulation is a fiberfill constructed with a unique 3D crimp of hollow-core and solid fibers, which provides excellent lightweight warmth with superior durability. The Thermolite insulation lofts up inside the Air Sprung Cells™ of our sleeping mats to prevent convective heat loss from your warm body to the cold ground.

Compressed Volume, Regular: 8.8L

Compressed Volume, Long: 10.9L

Shape: A generous shape to allow you to sleep in any position without compressing the down insulation and creating cold spots.

Elasticated Straps to Attach to a Sleeping Pad of Your Choice

Full-length Zipper Allows Top Section to Be Removed

Shaped Hood

Zipper Draft Tube

Forms a Snug Double Sleeping Bag by Zipping to Any Basecamp, Explore, Ascent, Trek, Journey, Venture, Altitude, or Traverse Sea to Summit Bag

Includes 70D Nylon Compression Bag

3 Season Rating: 15°F (comfort range 15°F to 60°F)