Sizing: standard running shoe lengthHeel: MediumMidfoot: Medium VolumeForefoot: MediumToe-Box height: MediumArch Structure: MediumShoe Shape: Semi-straight The HOKA ONE ONE Challenger ATR 3 is a highly cushioned, lightweight trail running shoe. Its versatile traction makes it suitable for a variety of terrain.*Runner’s World is a registered trademark of Rodale, Inc. All rights reserved.