This is the Tusa Intega Round Edge Skirt Silicone Scuba Diving Mask Features: NEW 3D SYNQ NEW Swift Buckle 3D Freedom Dry Technology Round Edge Skirt NEW Eco-Friendly mask case that is made from recycled material Corrective Lens available: MC-211 With years of research, TUSA has developed a mask skirt that adapts to your face. The 3D SYNQ Fitting Ring adapts to the users face creating a seal like no other mask. Large or small, wide or narrow, long or short, The TUSA Intega has got you covered.