Sfr recommend going one size up for thesethe rx xt is a revolutionary skate in the sfr range ultra light weight design with over size wheels allowing the user to travel quickly and smoothlyit also has a total ventilation system with vents located not only on the side of the skate but also with vent channels moulded in to the sole allowing air to pass all over the footultra light weight designslim 80mm 82a wheels for smooth outdoor skatingtotal ventilation systemsubtle yet mature sporty styl