Ultra HD Tempered-Glass Lensgoggles swimming adult youth feature a scratch-resistant tempered-glass lens that can provide crystal clear vision underwater and protect your eyes from withstanding water pressure for swimming or diving. Enjoy a pleasant water time without any blurring or distortion. In addition, the coating will not fall off due to salt water, making it perfect for open water swimming.180Panoramic ViewThe diving mask utilize thickened one-window lenses design with low inner volume, which is no visual obstruction and ensures a wider panoramic view. Greatly enhance your swimming experience.Premium Silicone No LeakMade of soft food-grade silicone, the skirt of adult swim mask offers a comfortable and watertight seal for various facial shapes. The non-toxic silicone is gentle enough for sensitive skin and doesn't leave any marks on the face.