Sundog Bolt Sunglasses An Ultra light-weight bottom less frame with a sporty sleek fit for superior comfort and performance Anti-fogging vented lens MaxFlex RILSAN frame, Megol temple tips and adjustable Megol nose pads for non-slippage Premium Polycarbonate Lens Flow Through Top Venting MaxFlex RILSAN Frame ContourFLEX Adjustable Megol Nose Pad 100% UVA/UVB filtration up to 400 nm