Optimized for minimal weight and maximum warmth, the Reactor Lightweight liner enhances sleep system performance with advanced Thermolite® Pro fabric, which uses infrared-absorbing ceramic pigments and hollow-core fibres to trap body heat. Adding up to 4 °C (7 °F) of warmth with minimal bulk, it’s ideal for ultralight expeditions. Stretch-knit fabric and articulated arm openings ensure unrestricted mobility. Treated with HeiQ Fresh odour control, it’s quick-drying, machine washable, and helps prolong your sleeping bag’s lifespan by reducing wash frequency.
- Lightweight and insulative: Thermolite® Pro technology with hollow-core fibres and infrared-absorbing pigments enhances warmth with minimal pack size
- Freedom to move: stretch-knit and shaped arm openings allow unrestricted movement, providing natural comfort throughout your sleep
- Technical shape and hood: ergonomic design with a fitted hood delivers optimal warmth and comfort without extra weight or bulk
- Fits any sleeping bag: stretch fabric allows the Reactor Liner to fit any shape of sleeping bag
- Stay fresh longer: HeiQ Fresh odour control technology keeps the liner fresh after extended use
- Sleep system integration: snap connectors at the shoulders easily pair with Sea to Summit sleeping bags for quick, hassle-free entry and exit
- Easy to keep clean: machine washable construction simplifies care and reduces wear on your sleeping bag over time
- Lower impact materials: crafted with certified recycled fibres and bluesign APPROVED materials to minimize environmental impact
- Best use: backpacking, cycle touring, paddle touring
- Type: thermal liner
- Weight: 255 g (9 oz.)
- Length: 193 cm (76 in.)
- Packed size: 18 cm x 10 cm x 10 cm (3.9 in. x 7.1 in. x 3.9 in.)