Saucony Women's Endorphin Speed 5 SneakersSaucony Endorphin Speed 5: Engineered for explosive speed, tuned for all day comfort, and trusted when it counts the most Upper engineered mesh Redesigned outsole offers increased heel coverage to boost durability during fast paced movement. A full length flex groove supports a more natural stride, helping you transition smoothly from landing to toe off. A semi rigid nylon plate runs the full length of the shoe, embedded between two layers of high