Insulated sleeping bag liners add warmth and personal hygiene to any sleeping bag.
Thermolite Pro technology uses knitted hollow fibers and absorbent infrared ceramic pigments to reflect body heat back to the wearer, increasing warmth and comfort.
The drawcord footbox can be opened and closed for optimal comfort and integrates perfectly with the Free-Flow Zip system footbox of some of Sea to Summit's sleeping bags.
HeiQ Fresh's anti-odor technology keeps the liner fresh even after extended use.
The knit fabric provides incredible stretch and freedom of movement in this mummy-shaped liner, which works seamlessly with any shaped sleeping bag. Sea to Summit Guarantee provides product lifetime.
The Sea to Summit Reactor series insulated sleeping bag liners extend your comfort range and improve the personal hygiene of any sleeping bag. Thermolite hollow core fibers are made to resemble polar bear fur, effectively trapping heat and providing a luxuriously soft and comfortable feel. Stretch knit fabric provides optimal comfort, and the Reactor fits into any sleeping bag. Additionally, the drawcord footbox provides plenty of ventilation and versatility for walking around camp while wearing the liner. Available in 3 different weights. Reactor technical liner makes your existing sleeping bag warmer and more versatile. Regular Liner uses hollow Thermolite Pro fabric with infrared absorbing ceramic pigments and Thermolite EcoMade fibers. This lightweight fabric adds up to 14 F of warmth to your sleep system. Extreme Liner features thicker, hollow Thermolite Pro fabric that adds up to 25F of warmth to your sleep system. Fleece liner has a grid pattern hollow core Thermoli
Featuring te Pro fibers, it offers the warmest sleeping bag liner that adds up to 32F of warmth to your sleep system.
