Lightweight and heavy-duty these sunglasses have been built around a double action hinge system providing unparalleled fit and function. :: Men > Sunglasses. Polycarbonate Lens: Lightweight lenses provide superior visual clarity and are infused with health preserving melaninGrilamid Frame: Impact-resistant frames are flexible. lightweight and highly durableHeat-Resistant: High-tensile frame material is heat-resistant and retains shape to always provide the best fitProtection: 100% UV protection. 98% blue light protection Size: one size.