waterproof gps case, hdd case, mp3 case material : waterproof nylon +EVA size: fit for your GPS, HDD and MP3. waterproof gps case, hdd case, mp3 case1. make of EVA, it can make different shell according to your request.2. it can well protect your gps, hdd, mp3 and so on.3. any question, welcome to contact us! waterproof gps case, hdd case, mp3 case