This waterproof bag is made of plastic and the underwater usage time should not exceed 4 hours. Perfect for swimming, the beach, rafting, or the water park. After use, in order to avoid infiltration of water be sure to dry the exterior of the waterproof bag. In dynamic environments such as high-speed slides or diving do not hang this product around your neck. Suitable for mobile phones with screens less than 6 inches. Before use, place a paper towel in the waterproof bag first and then dip the waterproof bag in water for 10-30 minutes to check whether water is entering the bag. This waterproof bag is sealed, waterproof, and compatible with phone cameras and touch screens. Color is blue.