With the THERM-A-REST Boost 650™ 20F/-6C, you get a sleeping pad that truly adapts to the situation. Its semi-rectangular design, which can be converted into a mummy shape, allows you to enjoy a feeling of space or maximize warmth when temperatures drop. This flexibility makes it a great companion on summer treks as well as on cooler mid-season nights. The balance between breathability and insulation makes for a more natural rest, even after a day of sustained effort.

Optimized warmth and intuitive comfort

The centrally positioned WarmZip™ closure subtly reduces the internal volume to concentrate heat around the body and increase thermal efficiency by up to 6°C. It can be adjusted in one simple movement without disturbing the sleeping bag's setup. The arm openings also transform the bag into a versatile cocoon: organize your bivouac or simply regulate the temperature without ever compromising on softness. The RDS-certified 650 fill power hydrophobic down is strategically distributed to provide consistent comfort throughout the night.

A durable model that is soft to the touch and designed to last

The Boost 650™ 20F/-6C also focuses on responsible materials: the pleasantly soft inner and outer fabric is made from 100% GRS-certified recycled nylon, complemented by a PFAS-free water-repellent treatment to cope with wet conditions. Careful details such as the anti-snag YKK zipper, adjustable hood, insulated collar, two-way zipper, and protective flap enhance the everyday experience and reinforce the bag's long-term durability. Compact, reliable, and pleasant to use, it is a safe solution for all three-season adventures.

Choose the Boost 650™ 20F/-6C now for more peaceful travel, wherever your adventures take you, and enjoy a versatile and comfortable sleeping bag.