A next-generation metal made from steel, chrome, manganese, carbon and silicon materials, FluidMetal combines strength and flexibility in one revolutionary frame. Twice as flexible and durable as Titanium and three times more flexible and durable than stainless steel, FluidMetal redefines comfort. Optical-quality hinges stainless steel 3 barrel hinge. Custom silicone nose pads and co-injected temple tips, ensuring that every frame fits perfectly and lasts longer than your boat. 8 base scratch and impact-resistant polarized polycarbonate lenses. 100% UVA/UVB protection. Worldwide lifetime warranty.