DescriptionThese co-molded frames are a bit smaller, but definitely akin to the classic styling of our Blackfin frames. Adventure-ready? You bet.FeaturesComfortable medium fit.Stainless steel integral hinge.Heavy-duty TR 90 nylon frames.Includes hard case.100% UV light blockage for max protection.100% polarization kills reflected glare and reduces eye strain.Built by hand and backed for life. Every pair of Costas include a lifetime warranty.Plastic lenses are lightweight, impact- and scratch-resistant.Glass lenses have the greatest clarity and are scratch resistant.This style is prescription ready