●YOUTH SIZE, PRIME PERFORMANCE: Helping the youth of tomorrow, one podium place at a time ●EASY TO INSTALL: Our Prime snowboard bindings have an intuitive layout that makes them highly easy to install. ●Based off the Axis ●Rider ideal boot size : US 2.0 - 4.5 / US 33 - 36 / MP 20.5-23.0 ●Riders level : Beginner; Flex : 5/10