Reactor Extreme Sleeping Bag Liner

The THERMOLITE® Reactor™ Extreme liner adds up to 25 degreesF and is Sea to Summit’s warmest knitted sleeping bag liner. If your adventures take you to colder climates, the Reactor Extreme will add plenty of warmth to a sleeping bag. In warmer weather, it can be used a ‘stand alone’ sleeping bag. The hollow core fibers of the THERMOLITE® fabric work like hollow polar bear or caribou fur – along with the knitted structure, this traps plenty of insulating air. Super soft and amazingly stretchy, the Reactor Extreme uses a heavier version of THERMOLITE®  to provide extra warmth for an incredibly comfortable night’s sleep. Use one to build your cooler-weather sleep system and to help to keep your sleeping bag clean, too. Stretchy, Thermolite® fabric is incredibly comfortable 110g/m² fabric is warmer than the 80g/m² Thermolite® used in the standard Reactor Works like your favorite cold-weather base layer to trap insulating air and increase warmth Easy care – no special soap is needed Signi