... % waterproof,different thickness and material for different market waterproof bag (MP3),2 zippers for waterproof.100% waterproof, for outdoor and indoor ... bag, pvc waterproof bag, tpu water proof bag for carmera, mp3 and mp4, mobile,and so on.1)material:PVC or ... you selections.38mm,35mm,30mm for your reference.. waterproof bag (MP3)