Sea to Summit Reactor Sleeping Bag Regular Standard x Liner, (85 31.5).

Insulated sleeping bag liners bring warmth and personal hygiene to any sleeping bag. Thermolite Pro technology uses knitted hollow core fibers and absorbing infrared ceramic pigments to reflect body heat back to the wearer for increased warmth and comfort. The drawcord footbox can be opened and closed for optimal comfort and integrates perfectly with the Sea to Summit sleeping bag's Free-Flow Zip system footbox. HeiQ Fresh's anti-odor technology keeps the liner fresh even after long periods of use. This mummy-shaped liner is made of knitted fabric with amazing stretch for freedom of movement. Seamlessly adapts to any type of sleeping bag. Sea to Summit products are built to last. The Sea to Summit Reactor series insulated sleeping bag liners extend your comfort range and improve sleeping bag hygiene. 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, allowing the Reactor to fit into any sleeping bag. Additionally, the drawcord footbox provides plenty of ventilation, giving you the versatility to roam 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 core Thermolite Pro fabric with infrared absorbing ceramic pigments and Thermolite EcoMade fibers. This lightweight fabric adds up to 14F of warmth to your sleep system. The Extreme Liner features thick, hollow-core Thermolite Pro fabric that adds up to 25F of warmth to your sleep system. Fleece liner features hollow core Thermolite Pro fibers in a grid pattern offers the warmest sleeping bag liner, adding up to 32F of warmth to your sleep system.