Catalyst has a hard coated optical lens. This protects the lens without compromising the quality of your photography. The music remains clear through the acoustic membranes and you can still enjoy your favorite music. The Catalyst iPad Sleeve has a unique design that makes the sleeve waterproof to a depth of 6.6 feet (2 meters), more than IP-68, the highest international protection class. The cover can of course also be used in snow. The Catalyst case protects your iPad continuously and permanently from mud, sand, gravel and dust. The Catalyst housing is designed to withstand a strong shock. This protection has been tested to military specifications MIL-STD-810G. This means that the iPad is protected at all times, even if you drop your iPad onto a concrete surface at a height of 1.2 meters.