Check the listing for details. SeaDive SeaDiver Rayblocker-HD Mask. Condition: New. Listed at 119.95 USD. SeaDive - SeaDiver - RayBlocker®-HDEasy-adjust buckles are attached directly to the mask skirt for a better, more comfortable sealEasy access nose pocketWide strap keeps mask in the perfect positionFog resistant coatingExclusive Benefits of SeaDive Vision-Enhancement LensesSince 2016, SeaDive has developed and field-tested, anti-reflective (ARC) mask coatings on tempered glass. Standard tempered glass has at least a 4% rate of reflection which can distort underwater vision. SeaDive’s ARC coatings allow almost 100% transmission of light to the diver’s eyes. SeaDive has an exclusive application and laboratory fabrication process to create these unique mask coatings. RayBlocker®-HDRayBlocker®-HD coatings allow almost 100% light passage which provides higher definition (HD) vision underwaterLight entering the lens is refined by Sharper Image Technology, a RayBlocker® exclusive, for a brighter, sharper imageReduces harmful UV rays and glareInside coating is a blue tint that reduces eye strain for very comfortable viewing