Bolle Sport Serpent Sunglasses (Dark Tortoise/Polarized Axis) 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. 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. Rx8 Prescription Available