Ruck harder, breathe easier with our best all-around boot. Conquer any terrain with OTB's M-Flex 8. Compliant for U.S. Army Wear with MultiCam & OCP and U.S. Air Force Wear with OCP.

OTB's sizing is similar to many popular running shoe brands, including Hoka, Asics, Brooks, and Altra. For women, we recommend subtracting 1.5 from your running shoe size to find your OTB Boot size (e.g., if you wear a size 8.5 in women's running shoes, you would be a size 7 in OTB Boots).

If you require a wider fit, we suggest WIDE options that correspond to approximately EE+ width.