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THERMAREST Boost 650™ 20F/-6C Sleeping Bag
- Brand: Thermarest
- Model Code: 14201
- Availability: 10
Comfort is not ‘one size fits all’, which is why the Boost 650 empowers you to customize its shape to find your perfect balance of space and warmth. As a spacious semi-rectangular sleeping bag the Boost provides all the room you need to side sleep, shift about, spread out and relax. The semi-rectangular shape gives you considerably more internal space than a mummy bag—you’ll feel unrestricted and free to sleep in whatever position you want all night long. But more space demands more body heat to warm it up and cold isn’t comfortable. That’s where WarmZip comes in. Zipping up the WarmZip center zipper transforms the shape of the Boost 650 from a semi-rectangular bag to a thermally efficient mummy bag. It pulls the 650-fill down around your body and reduces the amount of space your body needs to heat. WarmZip gives you the power to add up to 10F/6C to the Boost’s temperature rating. Standard Therm-a-Rest features like a puffy draft collar, a draft tube along the entry zipper line and a cinchable hood round out the Boost’s bliss-inducing comfort.
| Short | Short Wide | Regular | Regular Wide | Long | Long Wide | |
| Fits | 66 in | 66 in | 72 in | 72 in | 78 in | 78 in |
| Length | 73 in | 73 in | 80 in | 80 in | 85 in | 85 in |
| Weight | 2 lb 4 oz | 2 lb 13 oz | 2 lb 11 oz | 3 lb 5 oz | 3 lb 1 oz | 3 lb 13 oz |
| Girth Shoulder | 63 in | 75 in | 64 in | 76 in | 65 in | 77 in |
| Girth Hip | 59 in | 73 in | 60 in | 74 in | 61 in | 75 in |
