Windproof inner shoe lining designed for use with the LXSDL sandal. Size recommendation: We suggest ordering the same size for both the inner shoe and the sandal. The removable inner shoe is made from a softshell outer material and features a windproof TPE foam lining. It is secured with a double adjustable ankle closure with hook and loop, which has two large reflective areas. The inner shoe can be held in place with loops through which the sandal straps can be threaded.