The Rain Slicker cover for broadcast cameras, has several specialized design features. This particular model has an longer expandable back end for various batteries and wireless microwave transmitters. On the side of the bag there is a spare pocket for lens cap storage, (see: LC-55X65 for example) a wider clear vinyl window on the operator side, an extra no slip pad for extra comfort and support and a limited hook & loop closure at the base instead of a long zipper. A zipper at the view finder area makes installation easier; accommodating 1-1/2" to 3" eye piece view finders. (type: VF in model# window for Studio VF) A zipper access to zoom control when reaching over the camera. The fabric materials are a special formulation of waterproofing and fabrics, similar to the Storm Coat and Rain Slicker product groups. (Many Custom Patterns have been developed for “Box style” sports lenses. 45X, 55X, 70X, etc. CONTACT ken@portabrace.com)