Sizing: Fits large, purchase 1/2 size smaller than standard running shoe sizeHeel: Medium to narrowMidfoot: Medium to low volumeForefoot: Medium to narrowToe-Box Height: Medium to lowArch 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.