Therm-a-Rest Boost 650 Down Sleeping Bag
The WarmZip center zipper adjusts the bag's internal volume and tucks insulation around you, boosting warmth by up to 10°F without adding weight or bulk. The Wide sizing options and semi-rectangular shape accommodate broader shoulders and natural sleep positions that traditional mummy bags restrict. At 2 pounds 2 ounces in Regular 32°F, the 650-fill Nikwax Hydrophobic down balances warmth with reasonable weight for three-season backpacking.
- 100% Recycled Nylon
- Imported
- Built for everybody and bodies of all shapes and sizes, the Boost 650 is an ultra-comfortable backpacking sleeping bag with adjustable shape and warmth
4.4 Average Star Rating
Over 20+ Essential Sleep Products
Limited Lifetime Warranty
