“This thing is great and unbelievably warm for the size and weight. . . I carry it in the late fall and early spring to extend my 20 degree bag’s range. On nights when I don’t need the extra warmth I roll this liner into a fluffed up ball and tie it inside a bandana to make *THE MOST COMFORTABLE* backpacking pillow in the world.” For the full review go to trailspace.com.