New in box. Never worn. Wrong size for me. -Newly developed molded Lycra collar and tongue with sculpted heel to provide full range of motion. -Non-stretch Techloom forefoot keeps your foot secure and stable throughout your workout. -New lacing system limits lace-loosening during your workout to keep you performing your best. -Phantom lace loop eyelet offers the option to tuck your laces for streamline look. -New sockliner offers exceptional cushioning to handle even the most extreme training session. -Propelium™ is designed to maximize energy generation and provide superior comfort that will maintain midsole structural integrity longer than conventional EVA. -Lightweight Propelium midsole. Durable rubber outsole with forefoot crash pad. -The 8mm drop from the heel to the forefoot places your foot in a natural position for efficient running.