Brimz Sunshaydes are a revolutionary new sports sunglasses design with 100% UV protection that incorporates a wrap-around shield lens with a patented “Clip and Flip” nylon frame. The frame attaches to the sides of the brim of any standard baseball cap. Brimz are MADE in the USA featuring a shatter resistant Polycarbonate lens that is hard coated and scratch resistant. When not in use, Brimz easily flip up and hide beneath the bill of the cap, not interfering with your line of vision. When flipped up, Brimz are virtually undetectable. When needed, Brimz flip down perfectly into place. They will fit of most prescription sunglasses.