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You may find peace and solace trekking alone into a big green forest, but once night falls, the 15-degree Sierra Designs Utopia Sleeping Bag becomes your main source of comfort. The Utopia's Flex design uses elastic stitching to keep the quick-drying synthetic HeatSync insulation snug against your skin to eliminate cold spots, while still allowing you to move around in your sleep without constriction.

  • Rated down to 15° F, this bag is best suited for spring through fall nights in the mountains or winter nights in milder climates
  • HeatSync synthetic insulation compresses well and retains warmth even if it gets slightly wet
  • Offset Layer baffles reduce heat loss and cold spots
  • Flex stretch construction allows seven-eight extra inches of girth and helps eliminate dead air space inside the bag
  • Tough ripstop outer shell withstands trail abuse and feels soft against your tired body
  • A zippered draft tube, adjustable collar, and hood seal you off from cold summer weather
  • Shaped footbox doesn't restrict your natural sleeping position to keep you snoozing
  • A pillow pocket lets you insert a hoody or camp pillow (sold separately) for maximizing your sleepy times
  • A zippered chest pocket holds your headlamp for your nightly trip to the designated bush
  • Pad Locks hold your sleeping pad underneath so it stays put
  • Compression stuff sack packs the bag down to its 9 x 19in size

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Here's what others have to say...

How water resistant is this bag?

How water resistant is this bag?

Best Answer

The covering is not waterproof, but since the insulation is synthetic you can get it more wet than you could a down bag.

I would look at the Sierra Designs Trade Wind as that is a waterproof breathable bag.