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The Hollis M4 Mask is a perfect choice for a diver who value fit and field of vision above all else when choosing a mask. The M4 fits an amazingly wide variety of different face shapes and it offers a superior peripheral and vertical vision.
The single lens is moulded directly into the silicone skirt for a lightweight frameless design that allows the mask to be folded virtually flat for stowing in a mask pouch or BCD pocket. The strap buckles are fitted to the skirt and recessed behind the edge of the lens to reduce drag and reduce stresses and movement being transferred to the skirt
