Experience unparalleled warmth and comfort with the Reactor Extreme Liner, powered by advanced Thermolite® Pro fabric. Utilizing cutting-edge infrared technology, this liner is designed to keep you warm in the coldest conditions while offering exceptional freedom of movement. Perfect for outdoor enthusiasts, the stretch knit construction ensures a snug yet flexible fit, making it an essential addition to your cold-weather gear. Whether you're hiking, skiing, or camping, the Reactor Extreme Liner is your go-to solution for staying warm and comfortable.