Boy's ankle boots: The Geox J FLEXYPER B. with AMPHIBIOX technology. Their patented system provides excellent breathability and maximum comfort. The shoes feature perforated outsoles and a special microporous membrane that absorbs and wicks sweat away from the feet. The patented AMPHIBIOX technology provides waterproofing while guaranteeing durable breathability without compromising all-weather comfort. A special waterproof membrane ensures an ideal comfortable microclimate and keeps the foot warm, dry and naturally breathing.