These sport sunglasses have 1.1mm POLARIZED smoke lenses that improve vision by reducing the glare from bright sunlight. TPX material floating frame. TPX (Polymethylpentene) material offers flexibility and lightweight floating ability. Elastic adjustable headband, rubber nosepiece for comfort. Available in glossy black or metallic silver frames. The sport sunglasses come with soft microfiber storage bag. Designed for the demands regularly encountered while kite boarding, surfing, kayaking, jetskiing or any other water sport. Polarized lenses to enliminate the glare on your eyes while enhancing visual acuity while out on the water. The custom strap keeps the sunglasses on your head during manuevers. If you happen to hit a huge wave and your glasses go flying, don't worry - they float! SeaHawk glasses also feature custom intake vents that channel airflow across the lenses to virtually eliminate fogging.