This is the Tusa Imprex 3-D Hyperdry Mask M-32 3-Window for Scuba Diving Snorkeling Features: 3-window design with enhanced panoramic view and peripheral vision Hyperdry System for ease of mask clearing Round-edge skirt for maximum comfort and fit Low volume design for snug fit and easy clearing The M-32 Imprex 3D Hyperdry mask is a re-design of TUSA&';s very popular TM-8000Q Imprex Hyperdry, but with several key improvements. The mask features TUSA&';s patented Hyperdry System which allows for easy, no-nonsense clearing of the mask with a single exhalation. Additionally, the Imprex 3D Hyperdry incorporates side windows for enhanced panoramic and peripheral vision and TUSA&';s patented round-edge skirt for greater comfort and fit. Like all TUSA masks, the M-32 offers a wide range of features to enhance comfort and provide clarity of vision while underwater.