Caribbean Sun Polarized Sunglasses feature Monel frames, handmade Zyl tips, spring hinge temples, silicone nose pads, and a proprietary polarized lens. Caribbean Sun's Intelligent Lens Technology selectively filters out the "bad" light allowing the "good" informational light to reach your eyes, creating the cleanest and clearest view of the world around you. A 100% ultraviolet filter protects from the sun's damaging rays. A pure PVA polarizing filter absorbs up to 99.9% of reflected glare. Single vision prescription lenses are available on select styles. A custom hard case and micro-fiber cleaning cloth is included with each Caribbean Sun frame.