SeaDive SeaFire RayBlocker-HD MaskSeaDive SeaFire RayBlocker HD The first RayBlocker mask designed with freedivers in mind. While single shot technology allows for the low volume of this mask, it is the comfort and proprietary RayBlocker lens coating that will win your customers over every time. RayBlocker lenses, using Sharper Image Technology, provide a brighter, sharper image Reduces harmful UV rays and glare. Rather than use a traditional snap together frame, the SeaFire mask uses