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.
Features
- Constructed of insulating Thermolite® fabric, a hollow-core, breathable fiber that provides extraordinary warmth for its weight
- Adds up to 25°F of warmth to a sleeping bag; can also be used as a summer ultralight sleeping bag
- Liner helps keep the inside of your bag clean, saving it from the wear and tear of washings
- Drawcord hood with mini cordlock cinches around face to hold warmth in
- Mummy shaped liner features a 3D footbox providing plenty of room for feet
- Comes with a lightweight Ultra-Sil™ stuff sack
Technical Specs
| Best Use |
Backpacking |
|---|---|
| Sleeping Bag Shape |
Mummy |
| Added Warmth (F) |
Up to 25 degrees |
| Added Warmth (C) |
Up to 14 degrees |
| Stuff Sack Size |
3 x 5 inches |
| Material(s) |
Polyester |
| Dimensions |
84 x 36 inches |
| Weight |
14 ounces |