Altra’s speediest trail shoe to date features a full-length Carbitex carbon plate, upgraded midsole, and sticky outsole – it’s ready for fast technical terrain. The Carbitex MonoFlex carbon plate is flexible in one direction that naturally flexes with your foot and stiff in the other direction for added boost, propulsion, and stability with every step. Featuring a roomy toe box with plenty of space for your toes to move freely, a secure midfoot, and zero drop, so you can move naturally.