Reactor Extreme Sleeping Bag Liner with Thermolite Pro Fabric

Think of the Reactor Extreme as the layer that squeezes more out of the bag and mat you already own. Thermolite® Pro fabric uses knitted hollow-core fibers plus infra red-absorbing ceramic pigments, and those pigments bounce your body's heat back at you when the night turns cold.

Soft stretch-knit construction means it moves with you instead of fighting you. That same stretch lets this mummy-shaped liner sit inside sleeping bags of any shape. A drawcord footbox vents when you run warm, and the shoulder opening means you can wear the liner around camp before turning in.

• 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 the coldest of conditions
• Thermolite® Pro technology using knitted, hollow-core fibers and infrared-absorbing ceramic pigments to reflect your body's heat back for enhanced warmth and comfort
• Drawcord footbox and shoulder openings 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 odor 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 perfectly with sleeping bags of any shape
• Sea to Summit Guarantee is offered for the Lifetime of this product