Lenses: Light is reflected off the surface of the water and UV radiation is in higher concentration, therefore, it is important that the eyewear have 100% UV protection. Brown or amber lenses are recommended for sports with high glare, such as water activities. However, tint alone is not enough to minimize the glare reflecting off the water. Polarized lenses can absorb 98% of reflected glare. A hard fall on the water can cause an ordinary lens to shatter so we recommend polycarbonate lenses for their impact resistance and durability.