... waterproof bag (mobile),2 zippers for waterproof.100% waterproof, for outdoor and indoor active such as swimming,camping,mountain climbing,river rafting,and so on ... .also sell all kinds waterproof bag, pvc waterproof bag, tpu water proof bag for carmera, mp3 and mp4, mobile,and so on. ... you selections.38mm,35mm,30mm for your reference Tied on ARM.Good for the beach,the pool.. (mobile) waterproof bag