Features:- Dual Core- Shell - Polyurethane- Cuff - Polyolefin- Easy Entry Insert- External Screw Canting- Max Grip Alpine Soles- Gripwalk® Compatible- Dual 3d Liner Pro- Customizable- 40mm Power StrapSpecifications:- Last: 102mm- Flex: 120- Sizes: 24.0 to 31.5