With emerald frames and stylish tortoise shell arms the Hardknox sunglasses offer iconic styling with a distinguished twist. :: Men > Sunglasses. Protection: 100% UV protection. 98% blue light protectionMelanin CR39 Lens: Scratch-proof. lightweight lenses combine the optical clarity of glass with superior durabilityAcetate Frame: Handmade Italian frames made with Mazzuccelli raw acetate for a sleek and sophisticated finish Size: one size.