It s never too early to introduce your offspring to Neo-Tech insulation DuraFresh bio-technology and machine washable technology. 100 percent Waterproof. Constructed with 3mm Neo-Tech waterproof insulation. DuraFresh natural bio-technology activates to fight odors. Bogs Max-Wick evaporates sweat to keep feet dry. Plush lining for warmth and comfort. Machine washable.