The TLT8 CR is a light, unisex boot liner with great comfort and very good insulation. 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. The liner does not need to be custom fit. A universal model, the Seven Summits CR boot liner is compatible with the following ski touring boots from DYNAFIT: TLT8 Carbonio Unisex, TLT8 Expedition Men, TLT8 Expedition Women, TLT7 Series. TLT8 CR liner – Ready to go out of the box.