The Seven Summits CR is a unisex boot liner with all-round qualities. It is light, comfortable and keeps your feet reliably warm. CR stands for “Custom Ready,” which means the boot liner offers outstanding fit that will win you over the first time you try it. Out of the box, step in, and off you go. A universal model, the Seven Summits CR boot liner is compatible with the following ski touring boots from Dynafit: Seven Summits Men, Seven Summits Women, NEO Men, NEO Women, ONE Men, ONE Women, Mercury Men, Mercury Women and Vulcan Men. Seven Summits CR boot liner – Warm, comfortable and ready to go out of the box.