Aqua Sphere Mask Seal 2.0 Smoke Lens Seal Swim Masks with the clear lenses are designed to provide great visibility when swimming indoors and in low-light situations. The clear Seal Mask has minimal drag due to the hydrodynamic shape and a great, watertight fit. * Dive-quality Silicone skirt and strap provide comfortable, watertight fit * Patented Plexisol lens provides superior 180-degree visibility