Boost 650 32F/0C Sleeping Bag

Versatile Down Sleeping Bag for Backpacking & Car Camping

Sleep better outdoors with the Therm-a-Rest Boost 650 - a lightweight, packable down sleeping bag that lets you customize your comfort on the fly. Whether you're backpacking in the backcountry or car camping with friends, the Boost 650 adapts to how you sleep and how warm you need to be:

• Two bags in one — The semi-rectangular shape gives you unrestricted, roomy comfort for side sleepers and restless sleepers; zip up the WarmZip center zipper to instantly convert it into a thermally efficient mummy bag
• WarmZip technology — Patent-pending center zipper pulls 650-fill down around your body and reduces internal air space, boosting warmth by up to 10°F / 6°C when temperatures drop
• Arm holes for real livability — Read a book, reach your gear, play cards, or ventilate without ever leaving the warmth of your bag
• Two-way side zipper — Ventilate around your torso or feet when you're running warm; every zipper features YKK anti-snag pulls to prevent frustrating catches and tears
• Cinchable hood, draft collar & draft tube — Three layers of draft protection lock in warmth around your head, neck, and zipper line on cold nights

Lightweight and packable without sacrificing warmth:

• 650-fill hydrophobic down — RDS-certified down is placed where it matters most (top, core, shoulders) with Zoned Insulation, creating more warmth with less weight
• 100% recycled shell & liner — GRS-certified recycled nylon is soft to the touch and built for long-term use
• PFAS-free DWR coating — Water-repellent finish keeps the down dry and performing in damp and wet backcountry conditions
• Built to backpack — Lightweight, compressible design packs down small without bulk