●Frame material: alloy ●Optical attribute of lenses: UV400 ●Great versatility. Perfect for all sports, all outdoor activities, all seasons and all occasions. Perfect for men and women and teenagers. ●Polarised sunglasses reduce glare on roads, water, snow and other horizontal surfaces; restore true colour, eliminate reflected and diffused light and protect the eyes perfectly, suitable for all weather conditions. ●The glass material of the glasses is made of polarised TAC lenses, which are impact-resistant, scratch-resistant, durable and indestructible. It can effectively reduce glare effects, make vision smoother and clearer and achieve a polarisation effect of more than 99% without causing eye fatigue and headaches, making wearing comfortable.