Sizing: Standard running shoe lengthHeel: Medium to narrowMidfoot: Medium volumeForefoot: MediumToe-Box Height: MediumArch Structure: MediumShoe Shape: Semi-curved The Mizuno Wave Rider 20 G-TX is a neutral road running shoe that offers firm yet reliable cushioning along with a water resistant upper. The shoe is a great option for daily training and is suitable for faster uptempo efforts.