1.High quality material and closing system ensures full protection. 2.They can be used to hold cell phones when you are swimming or diving. 3.Great for: Camping, boating, fishing, tubing, swimming, or any other water sport. 4.Max 40m Waterproof Depth --- you can picture or capture the beauty under the water. 5.Plastic/ABS Material --- This kind of material can make our product lighter and the plastic sheeting is more operable. 6.IPX8 --- IPX8 is the highest grade of the waterproof grade standard. Your phone still can work under the water 40m.