The Brand Felt Ltd. Boot Liners AK80-10 Inch Height, Size 12 Radiantex/ polypropylene with green polyethylene Volara foam Please refer to the size chart in the image gallery and NOT Amazons sizing info Please add 0.75" to your size to account for the stitching Features Spaceage technology with RadianTex(TM) Exterior to Reflect the Cold, 100% polypropylene 8mm thick felt liners with reinforced heels Height is an approximation, see size chart in image for accurate measurements and see description for boot suitability!