The Reactor Midweight enhances your sleep system with advanced Thermolite® Pro fabric. Infrared-absorbing ceramic pigments and hollow-core fibres trap body heat, adding up to 6°C|11°F to a sleep system with minimal bulk. Stretch-knit fabric and arm openings allow unrestricted sleep, making it a great fit for any shape sleeping bag. Quick-drying and easy to clean, it features HeiQ Fresh odour control and helps extend your sleeping bag’s lifespan by reducing wash frequency. FEATURES Boosts Sleep System Warmth – Thermolite® Pro uses Far Infrared technology and hollow-core fibres to trap and reflect body heat without extra bulk 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 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 minimise environmental impact SPECIFICATIONS Short Regular Long Weight 330 g 350 g 365 g Dimensions 178 × 80 cm 193 × 80 cm 198 × 80 cm Packed Size 19 × 11.5 × 11.5 cm 19 × 11.5 × 11.5 cm 19 × 11.5 × 11.5 cm Recommended User Height 170 cm 185 cm 198 cm