Sea To Summit Pewter Reactor Lightweight Sleeping Bag Liner - Mummy: :

Sea to Summit

The Sea to Summit Reactor Lightweight Liner adds extra warmth to your sleeping bag with minimal weight. Built for versatility and comfort, it features stretch-knit Thermolite® Pro fabric that moves with you as you sleep, while integrated armholes provide complete freedom of movement for unrestricted rest. The liner fits easily inside any sleeping bag and snaps into compatible Sea to Summit bags for secure placement and effortless entry and exit. Using Far Infrared (FIR) technology and hollow-core fibres, Thermolite® Pro traps and reflects body heat, boosting warmth by up to 4 °C 7 °F without adding bulk or weight. With HeiQ Fresh odour control and quick-drying performance, the Reactor Lightweight Liner stays fresh and low-maintenance on extended trips. It also helps prolong your sleeping bag’s lifespan by reducing washing frequency, keeping insulation loft and performance intact longer. Features Freedom to Move: Stretch-knit construction and armholes allow unrestricted comfort in any sleep position Lightweight Thermal Boost: Thermolite® Pro with FIR and hollow-core fibres adds up to 4 °C 7 °F warmth Easy to Clean: Quick-drying and machine washable with HeiQ Fresh odour control Compatible Design: Fits all sleeping bags and snaps into Sea to Summit bags for secure positioning Protects Your Sleeping Bag: Reduces washing frequency to maintain insulation loft and extend bag lifespan Ideal for backpacking, travel, hut stays, and warmer-weather adventures Sizing & Weight Short (fits up to 170 cm): 235 g Regular (fits up to 185 cm): 255 g Long (fits up to 198 cm): 260 g