Geox is the shoe with a rubber sole that 'breathes' - Geox's solution for a totally waterproof AND breathable shoe - The rubber sole is perforated and contains a special microporous membrane, waterproof and breathable, that absorbs and expels sweat WITHOUT letting water in. As well as a fully waterproof leather upper, our rubber sole is perforated and contains a special microporous membrane, waterproof and breathable, that absorbs and expels sweat WITHOUT letting water in - As in all Geox shoes, feet keep cool and dry thanks to the breathable membrane and the perforated sole - Tests prove that a foot wearing a shoe with a conventional rubber sole is much more overheated that a foot wearing a Geox shoe.