Description Frameless masks are made from the direct bonding of the silicone mask skirt to the tempered glass. By eliminating the thick plastic frame, the frameless masks are lighter, lower in volume, and more streamlined. As a class, they enjoy more popularity than ever before. Features & details Large single window for unobstructed view Easy-to-adjust ratcheting buckles Double, feather-edged sealing skirt Made of hypoallergenic silicone for comfort and longevity Includes mask storage box