The inner is Thermo Flex Premium. It has been heat-molded twice. It has been used about 35 times. There are scuffs and frays from use (see photos 10-13). The insole that was used has been removed. This is a used item that has aged, so please consider purchasing with the understanding of this. Thank you for viewing. Size...25 - 25.5cm Model Year...18-19 model