PAST Outdoors

Sea to Summit Reactor Sleeping Bag Liner


Only 3 pieces in stock!

Sea to Summit Reactor Sleeping Bag Liner

Upgrade your sleep system's warmth in cool or cold conditions with the Reactor Liner by Sea to Summit. Made from innovative Thermolite® Pro fabric featuring infra red-absorbing ceramic pigments and eco-friendly Thermolite® EcoMade fibers, this liner is designed to elevate thermal performance. The stretch-knit construction offers maximum comfort and enables the Reactor to adapt to any sleeping bag. Take advantage of the drawcord footbox for ventilation and the convenience of being able to move around camp while still wearing your liner.

  • Thermal boost to retain heat and warmth, as the core of your sleep system the Reactor liner extends the performance of your sleeping bag and sleeping mat in colder conditions
  • Thermolite® Pro technology using knitted, hollow-core fibres and absorbing infrared ceramic pigments to reflect your body's heat back to the wearer for enhanced warmth and comfort
  • Drawcord footbox can be opened or closed for optimal comfort and integrates perfectly with the footbox of our Free-Flow Zip system in select Sea to Summit sleeping bags
  • HeiQ Fresh odour control technology helps keep the liner fresh even after extended use
  • Knitted fabric provides incredible stretch and freedom of movement in this mummy-shaped liner and works seamlessly with sleeping bags of any shape
  • Sea to Summit Guarantee is offered for the Lifetime of this product

Compact (Drawcord): 268g
Standard (Drawcord): 284g
Standard: 265g


Compact (Drawcord): 80 x 198cm
Standard (Drawcord): 80 x 216cm
Standard: 80 x 206cm


100% Polyester


15 x 7 x 11cm