Perfect for travel, the Bliss uses APL’s proprietary Propelium® technology, designed to maximize energy generation and provide superior comfort while it maintains midsole structural integrity longer than conventional EVA. The proprietary lightweight Propelium® midsole and traction pattern incorporate a durable rubber outsole with a forefoot crash pad, for the lightest APL running shoe yet. 8mm drop. Wt. 6.8 oz.