US Patent 7434336 Footwear incorporating a self-locking sock

Footwear, incorporating a self-locking sock for stopping the slippage of a user's foot inside the shoe while walking or running. The footwear with a self-locking sock comprises: a footwear with two male portions of hook and loop fasteners with one attached to the inner side of the tongue and the other attached to the insole, and a sock with two female portions of hook and loop fastener with one attached to the instep and the other attached to the sole.