The Macco s unique construction delivers all of the qualities you d expect in a professional dive mask, with a lighter more comfortable fit. Other frameless masks anchor the strap buckle on the flexible mask skirt. The Mako strap system attaches directly to the stable subframe and utilizes Sherwood s Quick Disconnect buckle to evenly distribute contact pressure against the face. The result is unprecedented comfort throughout your dive. Ideal for all diving environments, from tropical to polar.