These Muck Boot boots are 100% waterproof; Fully lined with 5mm neoprene for flexibility; Boots feature fleece lining for warmth; Lightweight EVA midsole for added comfort; Rugged outsole for grip; bioDEWIX Dry antimicrobial footbed insert topcover; NZYM for odour control and moisture management; Pull-tab for easy on and off; Hard-wearing outsole designed for optimum use on muddy surfaces; Estimated boot height 43cm/ 17.6"