Forget-They're-On-Fit an innovative fit system that delivers an unbelievable fit. Any face, any conditions. Optical-quality hinges stainless steel spring 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.