Therm-a-Rest Boost 650 32 Degree

Well, here’s a whole new take on versatility. We’ve seen shape-changing bags before, but the Boost has its own innovative approach with a vertical WarmZip that adjusts the internal volume of the bag and lets you choose between maximum wiggle room or optimized thermal efficiency depending on the situation. It pulls off the tightrope walk between weight and warmth and performance by utilizing strategically zoned 650-fill hydrophobic down insulation and lightweight recycled water-resistant fabrics. To better fit backpackers and campers of all shapes and sizes, Therm-a-Rest scrapped a gendered approach to sizing and offers the bag in multiple lengths and both standard and wide options.

Best Use: Backpacking and Camping

Price: Starting at $259.95

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