The Reactor Extreme Sleeping Bag Liner by Sea to Summit offers free-moving comfort on every maxed-out adventure!

Sporting a Mummy style with a drawcord footbox, this liner offers both shoulder and base openings for a more temperate comfort; integrated seamlessly with separately available Free-Flow Zip system featured on some separately available Sea to Summit sleeping bags.

Boasting a warm but lightweight construction of knitted, hollow-core Thermolite Pro fibres – featuring infra red technology to reflect your body’s heat back into the bag for enhanced warmth – this liner is the truly temperate addition to your off-grid sleep system, providing a thermal boost for retaining heat. From the sleeping bag to the basecamp hangouts, its knitted fabric offers superior stretch and the freedom to move within bags of various shapes and makes, while HeiQ odour control technology maintains freshness even following prolonged use.

Choose boosted warmth for a better sleep beyond the bedroom, thanks to the Sea to Summit Reactor Extreme Sleeping Bag Liner.

• Versatile for use with sleeping bags of various shapes
• Provides thermal boost to retain heat
• Thermolite Pro technology of knitted hollow-core fibres for trapping warmth
• Knitted fabric provides good stretch and free movement
• Enhanced by infra red-absorbing ceramic pigments for enhanced warmth
• HeiQ odour control technology for freshness even following extended use
• Two fits available: Mummy and Mummy with Drawcord
• Mummy with Drawcord features base and shoulder openings for comfort and mobility
• Mummy with Drawcord compatible with Free-Flow Zip systems in select Sea to Summit sleeping bags