REAL UV400 PROTECTION--Joopin lenses are engineered to block 100% of all harmful blue light up to 400 nanometers including UVA(320-400 nm),UVB(280-320 nm)and UVC(100-280 nm). LIFETIME BREAKAGE WARRANTY ON FRAME & LENS - Frame and lens are unbreakable for no risk purchasing. In case any broken problem happens for any reason, even you stepped on it by accident, contact the seller of Joopin to get a new replacement.Joopin provides lifetime service for all Joopin products. 30 DAY MONEY BACK GUARANTEE- You can easy return and get refunded for any reason like I don't like the style,I don't like the color,etc. Don't worry,You have no risk to try.