The children's swim goggles frame is curved to fit perfectly with your eyes to avoid water leakage and keep your eyes healthy from water bacteria. In addition, the kids swim goggles feature one-piece silicone earplugs to prevent water from seeping into the ear canal without worrying about losing the earplugs. Easily adjustable elastic straps and soft silicone seals ensure a comfortable fit for most face shapes. The straps are easy to adjust between sizes and the quick-release buckles on the side mean you can put your glasses on in seconds without getting your hair tangled. The silicone seal on the kids swim goggles is super soft and comfortable. They form a perfect seal every time thanks to the double seal design, and they surround the eyes to evenly distribute pressure, providing maximum comfort and no red marks around the eyes or nose for hours after swimming. No blurring or distortion. The outer surface coating of the lenses has UV protection to protect your child's eyes from UV rays and glare.