Sleep clean and comfortable, with the Sea to Summit Reactor Sleeping Bag Liner.

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. From the sleeping bag to hanging out a basecamp, 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.

With two fits available, the classic Mummy sports shoulder openings for extending limbs and stretching out, while the Mummy with Drawcord style offers both shoulder and base openings for more temperate comfort; integrated seamlessly with separately available Free-Flow Zip system featured on some separately available Sea to Summit sleeping bags.

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

• Creates soft sleeping environment
• Versatile for use with sleeping bags of various shapes
• 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
• Storage case included
• 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