Seamless high-elastic stretch rebound TechLoom Upper for extreme stretch that moves with your feet. Custom milled elastic strap. Slip-on design provides ultimate comfort and a seamless fit. Propelium® is designed to maximize energy generation and provide superior comfort that will maintain midsole structural integrity longer than conventional EVA. Newly developed lightweight Propelium® midsole and new traction pattern. Durable rubber outsole with forefoot crash pad. The lightest APL running shoe ever weighing in at 6.8 oz in a Men’s size 9. 100% Vegan, made using no animal products. The 8mm drop from the heel to the forefoot places your foot in a natural position for efficient running.