Seatec’s masks come with black or clear D.C. Formulated silicone for more light penetration, and are light weight and comfortable to wear. Each masks has self sealing technology and high impact poly frame and tempered glass. These masks are sure to be a favorite, minimum volume for extreme comfort and viewing capacity. Each mask is offered in a variety of colors, and with a 16 position strap with comfort adjustment swiveling hinge, one size will fit virtually anybody. Purge option available, and hard cases are included.