What Our Gearhead(R) Experts Are Saying:"The Endorphin Trainer is a game-changer for everyday runs. Its layered midsole foams feel lightweight and responsive, while the carbon fiber plate gives smooth toe-offs without sacrificing comfort. Perfect for long distances or daily training."The Endorphin Trainer blends speed and comfort for everyday training. Its incrediRUN foam offers lightweight, responsive cushioning, while the PWRRUN base ensures durability and support for high-mileage weeks. The Speedroll technology, enhanced by a 3/4-length carbon fiber plate, delivers smooth transitions and efficient toe-offs. Strategically placed XT-900 carbon rubber provides durable traction, and the secure engineered mesh upper keeps us comfortable on long-distance runs. =