A device for protecting footwear of a motorcycle rider comprises a sole of a water impermeable material, an upper of bodily flexible material and an adjustable strap for securing the device to footwear of the rider. The device is typically worn on the left foot of the rider because motorcycle transmissions are shifted by the left foot, leaving a characteristic wear pattern on the left shoe or boot of the rider. The upper allows substantial air movement around the rider's footwear and may be partially or wholly insulated with a foam layer in the upper. Some embodiments provide greater air circulation and less insulation. Two types of adjustable straps are shown.