The Aviator Collection - Designed to be worn over oval or round prescription eyewear frame shapes not exceeding 138mm x 53mm. They come standard with PDXÖ PolarDynamiXÖ Polarized Lenses and Side Shields, Wrap around 100 % UVA & UVB protection, Hyper-allergenic Crystal NylonÖ Frame and helps prevent Cataracts. Fitovers Eyewear is specifically designed to be worn right over your prescription eyewear. Fitovers Eyewear frames are also popular for use as "wear alone" sunglasses. With polarized glare-blocking protection and full wrap-around styling, Fitovers Eyewear is the perfect sunwear solution for your favorite outdoor pursuit. An Integrated Brow Bar prevents light that enters from above and aids in the Fitovers Eyewear "float factor"v - a feeling that the Fitovers Eyewear frame is literally floating above your prescription frame. PCX PolarDynamix lenses eliminate glare and help protect your eyes from harmful UV rays. They also offer natural color definition, superior visual acuity and enhanced contrast. Duo Hard Coat - Provides multiple impact and scratch resistant treatments, protecting your lenses for years to come. Flash-Reflect - A subtle flash mirror treatment that reflects bright light away when in intense light conditions. Flash Reflect gives the lenses a glass-like appearance and hides your prescription eyewear. Splotch Gard - An aleaphobic treatment that prevents finger prints and smudges from adhering to the surface of the lens. PDX POLARIZED AMBER LENSES Increase contrast and enhances depth perception where visual acuity over longer distances is required, such as tennis, golf, shooting or other outdoor sports activities subject to varying light conditions. PDX Amber lenses are ideal for lower light situations, like fishing in the late afternoon or early morning.