If chasing a new personal best is your daily goal, then step into the Saucony Endorphin Speed 5 to experience the runner's high. Packed with PWRRUN PB foam, these shoes offer unmatched energy return and a plush yet snappy ride that feels just as good at mile 1 as it does at mile 20. The SPEEDROLL technology propels you forward, so you can race against the clock in no time. The increased amount of rubber coverage in the heel provides run-ready comfort and durability, no matter how long you're on the road. Lace up, dial in, and shift into high gear with the Saucony Endorphin Speed 5. Saucony Endorphin Speed 5 features: When tempo days and long miles collide on the same training plan, the Endorphin Speed 5 is the shoe that handles both without compromise. PWRRUN PB foam delivers explosive energy return and a snappy, plush ride that stays lively from the first mile to the last. SPEEDROLL geometry propels you naturally forward, while the winged nylon plate adds torsional rigidity without sacrificing flexibility. The redesigned heel construction offers improved comfort and lockdown, and the lightweight engineered mesh keeps things breathable whether you're hitting intervals or logging a long Sunday effort. Saucony Endorphin Speed 5 Features: Size & Fit Guidance The Endorphin Speed 5 fits true to size for most runners, with a secure, well-locked-down upper and ample room in the toe box. For the best fit, runners with wider feet may prefer sizing up half a size, and those who like extra toe room may find a half size up adds welcome comfort over longer distances. Best For Built for runners who need a versatile trainer that shines on tempo and speed sessions while still holding up strong on recovery runs, long-distance efforts, and cross-training workouts. Cushioning & Road Feel PWRRUN PB foam delivers a uniquely snappy, energized sensation underfoot — firm enough to feel responsive at race pace, yet cushioned enough to stay comfortable mile after mile. The full-length longitudinal groove and SPEEDROLL geometry work together for a smooth, efficient heel-to-toe transition on roads and tracks alike. Break-In & Durability The foam settles into a more responsive, dialed-in feel after the first few sessions, with many runners noting the ride improves noticeably around 30 to 50 miles. Long-term durability is a standout — multiple runners have logged 200 to 900+ miles while the shoe maintains its structure, bounce, and outsole integrity. Care & Maintenance Remove the insole and allow both the shoe and insole to air dry after each run. Spot clean the mesh upper with a damp cloth and mild soap; avoid machine washing to preserve foam performance and upper structure.