Many divers prefer to use Frameless Masks because their Low-Profile and ability to fold-flat for easy carrying, even in a BCD pocket. Promate Swift scuba dive mask design bonds a high-grade silicone double feathered edge skirt directly to a single tempered Glass Lens for the ultimate in simplicity. The low internal volume allows for effortless clearing and the quick-adjust strap buckles are molded directly into the skirt for a flexible fit and reduced drag. The Frameless Mask has a wide split mask strap design for comfort and to give even-tension on the skirt for a proper seal. The mask is commonly used for open water diving, pool, recreation, snorkeling and more.