... waterproof.100% waterproof,different thickness and material for different market waterproof bag (mobile),2 zippers for waterproof.100% waterproof, for outdoor and ... bag, tpu water proof bag for carmera, mp3 and mp4, mobile,and so on.1)material:PVC or TPU2)thickness:>0 ... reference Tied on ARM.Good for the beach,the pool.. (mobile) waterproof bag