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Great mask good fit and comfortable. Iam diabetic and blind in my right eye so it makes good use of what vision I have
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Hollis M-4 Frameless Mask:
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M-4 Mask New! When choosing a mask, fit and field of vision come first. The M-4 gives you the best of both worlds, fitting a wide variety of faces and offering superior peripheral and vertical vision. It is low profile, stows easy and carries an excellent value.
Details Frameless silicon skirt Rugged mask box and adjustable mask strap included Increased vision and low volume