JIS IPX 8 (JIS Waterproof test highest grade) Patent Product - ISO9001 Features Directions to use : 1.Open the mouth of the case. 2. Put your phone into the case. 3. Zip the case and press. 4. Fold along the folded lines and stick the first velcro. 5. Close with second velcro. After use remove the water then take the phone out while keeping the mouth part in a downward position.