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The THERMOLITE® Reactor™ Extreme liner 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.
Verified Reviewer
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the thermolite reactor extreme slepping bag liner is great and effective. It is soft and fleece like and works well inside a sleeping bag. Feels like a real blanket and adds warmth to your bag. However depending on you and the type of sleeper you are you may not get the results the tag says. it says it adds up to 25 degrees but for me I hink it adds a comfortable 10-15 degrees. Not bad. The real dig to this product is its warm weather advantage. No longer do you need bulky blankets are sleeping bags for warmer nights. this little water bottle size stuff sack will do just fine. You only have to carry about 7 oz.
