Moszkito Waterbug - 501 - Women's Orthotic Arch Support Water Sandals Rubber Rubber sole Contoured- 16mm arch offers comfort- support and even weight distribution. Proper support helps align ankles- knees and hips. Firm- but flexible rubber EVA outsole resists slips to keep you steady on your feet. Heel Height: 1". Material Content: full-grain leather upper and upper lining- EVA midsole- rubberized EVA outsole.