Bolle Performance Parole Sunglasses Medium/Large fit UVA/UVB Protection - Bolle exceeds the industry standard with 100% 20.3 Poly carbonate Lenses - Sunglasses should protect you from more than just the sun. That's why our polycarbonate lenses are made from lightweight, premium-grade resin that's 20 times more impact resistant than glass-and three times lighter. Rx S.O.S. Prescription Available S.O.S RX Adapter - With one simple snap, the patent-pending technology in our Rx adapter lets you attach prescription lenses to your PAROLE, VIGILANTE, SWIFTKICK OR TRAVERSE sunglasses.