?100% WORRY FREE POST-SALES SERVICE?Every eyewear from YIWAEYE have a 90 days’ money back guarantee and a one-year warranty. If there is any problem, please do not hesitate to contact us, we will be glad to give you a satisfactory solution as soon as possible. ?PREMIUM LIGHT WEIGHT SLIM FRAME?-The whole eyeglasses is only 9.7g(0.02lb), which is ultra light and comfortable, offering almost no pressure on your head and nose. Classic and fashion full-rim design suits to any face type, young or old, male or female. Small slim frames as the half lens reading glasses allows you simply look down to read and look up to your surroundings not have to continuously take them on and off. ?DURABLE, COMFORTABLE & FLEXIBLE?-These high quality folding reading glasses, whose frames are made of Swiss EMS TR90, and temples are made of German Wagner stainless steel with IP plating technology, are superior sturdy, elastic, and corrosion-resistant, so they cannot be easily deformed or broken, faded or discolored, which are strong enough for a long lasting use. ?2 PCS OF BLUE LIGHT BLOCKING & EXPLOSION PROOF READERS?-Prevent 90% harmful blue light and 100% UV400, alleviate visual fatigue and protect eyes from long periods of web surfing, gaming and reading before computer screens or mobile phones, watching TV or videos, or working under fluorescent lights with UVA/UVB protection and glare reduction. Have a pair handy wherever you are and enjoy your digital time without any worries from eyestrain, migraine, sleeplessness and blurred vision!. ?EXTREMELY PORTABLE DESIGN FOR TRAVELLING?-This foldable reading glasses with an ultra-thin compact design and an special hard flat case can be put into the most pockets or wallets, which is super portable and utility, occupying almost no space. Tiny, slim and mini size, like a half reading glasses, but with not-so-small lenses, can still give you a clear view, which is perfect and convenient for going to restaurants to read menus, browsing mobile phone messages.