The Saucony Endorphin Speed 4 are ideal for runners looking to improve their performance with each stride. Designed for daily and speed training, they offer a perfect combination of cushioning and energy return. Surface: Asphalt Shoe type: Neutral Use: Training, Speed training Weight: 233g Drop: 8mm (36mm/28mm) Plate: Curved nylon chassis Damping: PWRRUN PB. Ideal for: competition/tempo run. Cushioning: PWRRUN PB. Drop: 8 mm (36/28 mm). Surface: Asphalt. Distance: 10K Half Marathon Marathon. Sockliner: SRS. Technologies: SPEEDROLL technology offers propulsion and forward foot movement without extra effort. The energy-efficient PWRRUN PB cushioning provides dynamic and responsive cushioning. The design is improved with engineered mesh and an integrated tongue for a perfect and secure fit. Try our new SRS (Super Responsive Sockliner). We dare you not to bounce! WINGED, FLUTED TPU: Redesigned plate - Vertical reinforcement to add torsional rigidity while maintaining forefoot flexibility. Weight: 236g.