0 6401.92 Waterproof footwear covering the ankle, but not 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.. incorporating a protective metal toecap, orthopaedic footwear, skating boots with ice or roller skates attached, and toy footwear) 25 18 15 12