Bangerz Field baseball sunglasses HS8700 Optically correct, high-impact shatterproof polycarbonate lenses Compact, lightweight TR-90 nylon frame for impact protection Innovative Forceflex "flow through" injection-molding manufacturing technique bonds the frame directly through the lenses to set a new standard in durability and safety Lenses are coated for anti-fog and anti-scratch resistance Adjustable, washable retention head strap