Hollis M-4 Scuba Mask

Hollis M-4 is a is low profile that offers superior peripheral and vertical vision.  Mask has a single lens made from tempered glass for excellent optical characteristics and safety. The frameless black silicone skirt has a double feathered edge for a perfect seal, large one handed nose pocket for easy ear equalization. The easy adjust-buckles and quality wide split black silicone mask strap will keep the mask properly in place