TUBING CONNECTED | The Seac Extreme 50 "Tubing Connected" system features buckles integrated into the shell to reduce pressure on the face and a large silicone band behind the neck to hold the mask firmly in place MULTI USE | Seac Extreme is available in different colors suitable for both scuba and freediving GRADUATED MASK | Seac Extreme 50 is perfect as a graduated mask for divers. You can replace the standard lenses of the Seac Extreme 50 with the graduated versions for a sharper close-up view, easy to fit COMFORTABLE AND SAFE | Seac Extreme 50 is a double lens mask made of tempered glass, with a soft skirt and adjustable strap in hypoallergenic silicone of the highest quality RIGID CASE | Seac Extreme 50 is sold with a practical transparent hard case to store the mask after use