SEA TO SUMMIT Reactor Midweight Sleeping Bag Liner - Black

The Reactor Midweight provides welcome warmth when temperatures drop. Combining hollow-core Thermolite Pro fibers with far-infrared (FIR) technology, it traps and reflects body heat to increase internal temperature by up to 6°C. Despite its high performance, it remains compact and lightweight, making it an ideal choice for high-altitude hiking, extended expeditions, or cool nights in a bivouac.

Stretch comfort that adapts to all sleeping positions

Its stretch knit construction and integrated armholes allow you to move freely, whatever your sleeping style. This flexibility also makes it easy to get in and out of the sleeping bag liner. Compatible with all sleeping bags, it interfaces naturally with SEA TO SUMMIT models for an even more intuitive experience. This total freedom promotes deep rest even after long days of exertion.

Long-lasting hygiene and protection for your gear

HeiQ Fresh anti-odor treatment helps the fabric stay fresh longer, even with repeated use. It washes easily, dries quickly, and acts as a protective barrier for your sleeping bag: by limiting frequent washing, it preserves its loft and helps extend its life. This durability makes it a wise choice for anyone who wants to optimize their sleeping system while maintaining a high level of hygiene.

Treat yourself to significantly warmer and more comfortable nights: choose the Reactor Midweight and enjoy powerful thermal gain to continue your adventures in the best conditions.