'Feel the rush! Chase your fastest miles yet with the Saucony Endorphin Speed 5. Built to go fast and feel smooth, these shoes feature a full-length semi-rigid nylon plate sandwiched between two layers of responsive PWRRUN PB foam to deliver a snappy, propulsive ride. The reconfigured outsole with expanded heel coverage improves durability and grip, while the full-length groove enhances flexibility for a more natural, fluid stride from foot strike to push-off. Whether you're training for race day or cruising through daily miles, the Saucony Endorphin Speed 5 keeps you light on your feet, fast in motion, and fully in control. Saucony Endorphin Speed 5 features: When your training calls for quick turnover without giving up everyday comfort, this pair is built to keep you moving with a light, energetic feel. The Saucony Endorphin Speed 5 blends smooth transitions, responsive cushioning, and a streamlined upper for everything from workout days to longer efforts and race-focused miles. Size & Fit Guidance For the best fit, we recommend most runners consider a half size up, especially if you prefer extra toe room for longer runs or usually sit between sizes. Reviewers often describe the fit as secure and close through the midfoot, while runners with narrower feet may be comfortable in their usual size. Best For Best for tempo runs, intervals, uptempo daily training, and race prep when you want a lightweight shoe with a fast, versatile feel. Cushioning & Road Feel Reviewers consistently highlight the light, springy ride and lively rebound, noting that the shoe feels especially good when the pace picks up. The cushioning leans responsive rather than overly soft, giving you a balanced mix of pop, control, and road feel."