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The Fittovers Yamba Polarized overglasses are sunglasses that fit over perscription eyewear and look great. The frames have rich colors and a substantial look and feel. The lenses are polarized to eliminate glare and block 100%UV(ABC). Frames fit over most optical frames smaller than: 5 11/16" X 1 3/4" (145mm X 46mm) Frames fit comfortably over perscription glassesPolarized lenses eliminate glare and block 100%UV (ABC)Frames look great and have a substantial feelFit over most optical frames smaller than 5 11/16" X 1 3/4" (145mm X 46mm).