The Bolle Formula sunglasses are part of Bolle's Sport Collection. Lightweight & sporty they provide 100% UVA & UVB protection & have optically perfect lenses that are 20 times more impact resistant than glass.* Sport Wind up. Or wind down. These multifaceted sunglasses are with you all the way. They're high performance when it's necessary & low key when it's not. So no matter what you're facing, you can always see clearly.