Waterproof footwear covering neither the ankle nor the knee, with outer soles and uppers of rubber or of plastics, the uppers of which are neither fixed to the sole nor assembled by stitching, riveting, nailing, screwing, plugging or similar processes (excl. covering the ankle but not the knee, footwear incorporating a protective metal toecap, orthopaedic footwear, skating boots with ice or roller skates attached and sports and toy footwear)