Sizing: Fits large; purchase 1/2 size smaller than standard running shoe lengthHeel: Medium to wideMidfoot: Medium volumeForefoot: MediumToe-Box Height: Medium to LowArch Structure: Medium to HighShoe Shape: Semi-Curved The Under Armour Speed Tire Ascent Low is a lightweight varied-surface trail running shoe. The nimble low to the ground design makes it easy to pick up the pace over rugged terrain.