Endorphin Speed 5 Shoe Size:6.5 Stretchy circular-knit and breathable mesh

Stretchy circular-knit and breathable mesh on upper

Whistle in sleeve provides added security

Maximum comfort - the PWRRUN+ sockliner coupled with PWRRUN midsole provides a soft feel the moment you step in

Reflective yarn on the cuff

providing extra cushion

Endorphin Speed 5 Shoe Size:6.5 Stretchy circular-knit and breathable meshSpeed day race day The Endorphin Speed 5 is built to go fast and feel smoothwhether you're pushing the pace on track night with friends or you're chasing a PR. A newly designed nylon plate and responsive PWRRUN PB cushioning come together for snappy transitions and a fast ride. This is speed you can count on. Snappy Ride A full length semi rigid nylon plate between two layers of responsive PWRRUN PB foam, giving you a perfect balance of propulsion and