Bolle Sport Boa Sunglasses (Dark Tortoise/Polarized Sandstone Gun) polarized Fit - Medium/Large 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 Rx8 Prescription Available and premium-grade resin that's 20 times more impact resistant than glass-and three times lighter That's why our polycarbonate lenses are made from lightweight