Saucony Endorphin Speed 4 PACE / WATERWAYS This color is sold out and I believe it's difficult to obtain. Only tried on, less than 10km of running. This shoe is highly praised by shoe advisor Mr. Fujiwara. The SpeedRoll technology makes it easy to increase speed, and the forward propulsion is significantly improved. Excellent energy efficiency, and PWRRUN PB cushioning uses a super foam that quickly returns to its original state. The improved design features a tongue integrated with the upper for a secure fit. Vertical reinforcement maintains flexibility in the forefoot while increasing durability. Also, a sockliner combining PWRRUN+ and EVA materials is used, providing lightness, increased responsiveness, and improved comfort. This is a recommended racing model for races and speed training.