Sizing: Fits large; purchase 1/2 size smaller than standard running shoe lengthHeel: Medium to narrowMidfoot: Medium to low volumeForefoot: MediumToe-Box Height: MediumArch Structure: MediumShoe Shape: Semi-Curved The ON Cloudflow is a lightweight neutral trainer that features 18 individual cloud pods underfoot for a high level of cushioning and responsiveness. This shoe encourages a natural roll that is ideal for tempo runs and faster efforts.