Sizing: Fits large; purchase 1/2 size smaller than standard running shoe lengthHeel: MediumMidfoot: Medium to narrow volumeForefoot: MediumToe-Box Height: MediumArch Structure: MediumShoe Shape: Curved The adidas Terrex Agravic Speed is a lightweight, performance trail running shoe. From daily training to trail racing, the shoe offers a fast feel over a variety of terrain.