Inov-8 Men's Tri-X-Treme 275 Triathlon Running Shoe 100% Synthetic Imported Synthetic sole Running shoe featuring single-pull bungee lacing and logoed toe bumper Natural Fit last shape with a wider toe box Meta-Flex forefoot flex grooves Full-length array of side drainage ports Fusion Rubber high-durability outsole compound 6mm heel-to-toe drop