IDEAL FIT:The booty construction and X-band gore strap embraces the contours of your foot for the most exact fit possible. You're comfortable room the very first wear. LIGHTWEIGHT CONSTRUCTION:Components and compounds are carefully considered to weigh less, so you can go further. No sew saddle mudguard and toe. ENHANCED BREATHABILITY:Ventilating mono mesh vamp and quarter details and temp-regulating materials breathe with you. Stay cool and dry all day, everyday. RESPONSIVE CUSHIONING & ENERGY RETURN: Superfeel NRG foam is our supercritical foam that provides an unbelievable cushion and incredibly lightweight. Proprietary Superfeel NRG foam absorbs shock and provides rebound with each step. Propels you forward all day.