Sizing Notes: Please be aware that this style runs a half size smaller than the standard Old Skool. The Old Skool Mule, a retro take on the iconic sidestripe skate shoe, combines the iconic look of the Old Skool with the casual, easy on-and-off styling of a mule. Featuring suede and canvas uppers, the Old Skool Mule also includes re-enforced toecaps and signature rubber waffle outsoles.