The Ewa-Marine Splashix Underwater Large Housing comes with an HD-quality, optical glass front port, to ensure that you can get perfect quality pictures. It is manufactured from double laminated PVC. Because of the extremely light weight and easy to use, you can protect your own digital camera perfect from water, sand, dust and humidity. It doesn't matter if you go snorkeling (up to 6m / 20ft depth), on the beach, in the desert, heavy rain, rafting or sailing. It has a pair of non-corrosive and seawater resistant clamping rails which fit together for perfect sealing. They tighten by means of two screw knobs.