For over seven years, 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. Easy-adjust buckles are attached directly to the mask skirt for a better, more comfortable seal (non-purge model). The single lens provides an unobstructed field of view. Also available with purge valve. Fog resistant coating. Plastic box with lid included.