The Reactor Fleece sleeping bag liner is made from Thermolite® fabric , known for its excellent insulation capabilities, combined with a grid fleece which optimizes heat retention . This unique blend provides superior insulation and increased warmth without weighing down your gear.

This liner is equipped with a drawstring which allows for a precise fit around the head and shoulders. This tightening system is essential for preventing heat from escaping and cold from penetrating, increasing thermal efficiency while you sleep. Compared to the classic Reactor liner, the addition of fleece in this Fleece version provides an extra level of warmth, making it a perfect option for those who face extremely low temperatures. It considerably strengthens the insulation of your sleeping bag.

The Reactor Fleece liner can be used with a variety of sleeping bags or on its own, depending on weather conditions and your specific needs. Its flexible design allows use in various environments and situations. Adding this liner to your sleeping system can significantly increase the comfort temperature of your sleeping bag, up to +22% thermal boost, allowing you to stay warm even when temperatures drop drastically during the night.

Designed to meet the needs of campers and hikers who find themselves in cold environments, this liner is an essential addition to all outdoor equipment, improving the quality of your rest and allowing you to calmly face the cold.