The PowerShot Waterproof Cases are specially designed to protect your PowerShot Digital Camera from sea water and sand. Reliable and easy to use, these cases offer new shooting possibilities and help you realize the full potential of digital photography. You can also use your Canon Waterproof Case on land - in environments where snow, sand, excess humidity or dust could lead to damage. Ideal for skiing and many other activities, a Canon Waterproof or All-weather Case provide an added measure of safety for your PowerShot camera on land. The Canon WP-DC16 Waterproof Housing is to be used with the Powershot A720 IS.