Thermolite Reactor Extreme Liner - Reg Size:- In the women’s liner

In the women’s liner

ready for anything

Also compatible with older technical ice tools like the orange Viper

Fits the Men's Altra 75 & 85 and most other packs up to 95L

and quick to install on the rope

Thermolite Reactor Extreme Liner - Reg Size:- In the women’s linerThe Thermolite Reactor Extreme is the warmest backpacking knit sleeping bag liner Sea to Summit offers. The hollow fiber threads work just like the hollow fur of a polar bear in that they trap heat effectively. When the mercury drops you'll appreciate the mummy shape and drawcord hood with mini cord lock attached. Depending on your environment and sleep conditions, this liner can increase your sleeping bag warmth by up to 25F.