[ANTI-BLUE LIGHT & ANTI-RADIATION COATED LENSES]--JM square blue screen blocking eyeglasses are designed for comfortable daily wear with durable lightweight frames and anti-blue light coatings which filter 90% blue rays and reduce eyestrain, prevent eye dry. [UV400 PROTECTION]--Blocks 100% harmful UVA/UVB Rays, perfect for office and home, keep a pair at your desk. Ultra-lightweight and flexible frame material for durability and comfortable long-term wearing.ache and make you sleep better [LIGHTWEIGHT&HIGH QUALITY ]--Retro metal frame with acetate temple tips is comfortable against the skin, fits both men and women. Lightweight durable comfortable frame with adjustable nose pads, no pressure for longtime wearing. [STYLISH RETRO SQUARE FRAME DESIGN ]--The square frames can be matched with all kinds of facial forms. The multiple patterns and colors can be matched with different outfits in a daily fashion. [RISK-FREE PURCHASE ]--30 Day Money Back Guarantee: All JM customers enjoy 30 Day Money Back Guarantee. Customers can return and get refunded in case the purchasing is not satisfactory for any reason.