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Utopia 15 Degree Sleeping Bag
Sierra Designs   Utopia 15 Degree Sleeping Bag

A great year-round bag or a three-season choice for cold sleepers from Sierra Designs, the Utopia combines HeatSync continuous-filament insulation with Flex technology to deliver tough to beat quality in a light, durable design.


  • Heatsync Insulation
  • Ergonomically shaped footbox
  • Snag-free zipper tracks
  • Draw cord at collar
  • Draft collar
  • Flex stretch external construction
  • Offset Layer Construction
  • Ergonomic hood
  • Pillow pocket
  • Zipper draft tube
  • Pad locks
  • EN Tested
  • Includes stuff and storage sacks
  • Chest pocket for valuables
Ergonomically Shaped Foot Box
Shaped to keep you sleeping in comfort. Allows for ease of movement, while remaining thermally efficient.

Flex Technology Construction
Flex eliminates constriction, allowing the sleeping bag to move with the user and keeping them warm and comfortable. Flex greatly improves a bag`s thermal efficiency. Technically advanced elastic binding tape is used on the 3-season down Flex bags while we use a lighter proprietary elastic thread in the Ultralight Series. Ultralight bags feature 7 inches, 3 Season bags feature 8 inches of expandable baffles that allow the girth of the bag to expand as and where needed.

Short staple insulation that is warm, lightweight and compressible.

Style 00595811RL  |   This Item is Currently Out of Stock.

Sierra Designs Utopia 15 Degree Sleeping Bag

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Type: Three season backpacking
Temperature Rating: 15°F/ -9°C
Shell: 30D Polyester Micro-Ripstop
Insulation Fill: Heatsync™ Insulation
Length: 78"
Max User Height: 6ft
Shoulder: 57-65"
Hip: 53-61"
Foot: 35-43"
Stuffsack Size: 9" x 19"
Total Weight: 3lb 9oz