RockBros Men's Polarized Sunglasses with Interchangeable Lenses Sports Goggles TR90 SWITZERLAND A Swiss technology, this thermoplastic is the material used in all of our polarized sunglasses. Its extreme flexibility, durability and light weight make it the perfect material for performance eye wear. ULTRA LIGHTWEIGHT As with any piece of high-performance equipment, weight is an important factor. TR90 is incredibly lightweight, which contributes to the comfort of our eyewear and the tendency to forget youre wearing it. UV PROTECTION All of our lenses block 100% of UVA, UVB and UVC rays, and harmful blue light to 400nm. These harmful rays are a leading cause of cataracts, skin cancer and wrinkles around the eyes-all great reasons to block them out. ADJUSTABLE FEATURES Adjustable nose pads are available in some of our design. A great feature for customizing the fit of your glasses, they are especially beneficial for those with hard-to-fit faces and anyone who needs to accommodate long eyelashes. Beyond fit, adjustable nose pads allow you to modify airflow and ventilation behind the lens by providing the ability to increase or decrease the space between the glasses and your face. INTERCHANGEABLE LENSES The technology used in our polarized sunglasses with Interchangeable lenses. The different lenses, different shades and colors. This allows you to choose one that fits you best.