Saucony Men's Endorphin Speed 5 Winter Footwear makes aid station refills a

makes aid station refills a breeze

Lightweight synthetic material

You'll get a boost of energy each time you hit the ground with the soft

A propulsive speed training partner

Saucony Men's Endorphin Speed 5 Winter Footwear makes aid station refills aMade for SPEED 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