TUSA Freedom HD Scuba Diving Mask w/ 2oz Defog Spray Package Includes Tusa Feedom HD Scuba Diving Mask and 2oz. Mask Defog Spray, exclusively by DiveCatalog. ncredibly wide field of view 183 degrees Rotational Buckle System Large frame with minimal internal volume Five-position strap angle adjuster for micro-adjustment. Round-edge skirt.