The Saucony Endorphin Pro 4 is a racing/competition shoe featuring carbon plate + high-rebound + high efficiency. It uses a dual-layer Pebax foam construction (bottom PWRRUN PB, top PWRRUN HG) sandwiching a full-length carbon fiber plate with Speedroll rocker geometry. Ideal for half marathon and marathon runners aiming to maintain steady pace, reduce leg fatigue, and chase PBs. Best for experienced runners with stable form. May be too aggressive for beginners or daily training. Specs: heel 40mm, forefoot 30mm, 10mm drop.
