YX Polarized Military Shooting Sunglasses ,with 3 Set Interchangeable Lenses,Yellow Night Vision,UV400 Material: Polycarbonate (PC) lens,Frame material from gemany Excellent anti-abrasion and impact resistance, bulletproof Adjustable head belt, enjoy the sporting The interior frame is seated with soft foam for comfort wearing,prevent sweat into your eyes UV 400 PROTECTION,it can block 99%-100% of both UVA ,UVB and UVC harmful radiation 30 DAY MONEY BACK GUARANTEE- All customers enjoy 30 Day Money Back Guarantee. Customers can return and get refunded in case the purchasing is not satisfactory for any reason. You have no risk to try.