Patent ID: 7735840

Claim:
An article of footwear, comprising: an outsole and an upper connected to said outsole, said outsole having a toe area, a heel area spaced from said toe area and a bottom surface, said toe area being formed with a first cavity, said heel area being formed with a second cavity, said outsole being formed with a recess extending from said bottom surface toward said upper in between said first and second cavities; a first roller removably mounted within said first cavity, said first roller being coupled to a first axle having opposed ends each protruding from one side of said first roller; a second roller removably mounted within said second cavity, said second roller being coupled to a second axle having opposed ends each protruding from one side of said second roller; a strap having a first coupler which mounts to each of said opposed ends of said first axle and a second coupler which mounts to each of said opposed ends of said second axle, said strap being received within said recess.