GPS bag, HDD bag MP3 bag material : neoprene+EVA size: fit for your GPS, HDD and MP3. color: have different color available GPS case, HDD case, MP3 case1. make of neoprene + EVA, it can make different shell according to your request.2. it has the eva ptotecter, can well protect your gps, hdd, mp3 and so on.3. any question, welcome to contact us! GPS bag, HDD bag MP3 bag