Five Ten Men's Exum Outdoor Action 100% Nubuck leather Rubber sole Built for use with strap-on crampons, the mid-top Exum Guide has a durable non-sealed water-resistant leather upper, polyurethane heel and extra-plush EVA cushioning Double stitching, Five Ten proprietary heel cage Stealth C4/S1 rubber Soles are co-molded Stealth C4 and S1 for the ultimate in durability and friction