Imported Metal frame Polycarbonate(PC) lens lens Non Polarized Anti-Reflective Coating coating Lens width: 53 millimeters Lens height: 47 millimeters Bridge: 18 millimeters Arm: 142 millimeters ·        BLUE BLOCKER LENS-Firmoo Glasses use blue light blocking lens with functional coatings anti scratch,cut harmful 380-450nm blue light, glare and reflection from computer, tv, phones and other digital devices ·        REDUCE EYESTRAIN/HEADACHE-Blue light glasses filter blue ray, uv, reflection, so that your eyes would not strain, headache will be prevented, migraines be relieved, no worry about tired eye, fry-eye, headache, especially after hours of exposure to harmful blue light ·        SLEEP BETTER-Firmoo Blue light blocking glasses can reduce digital eyestrain and headache like computer, tv, tablets and so no, so you can enjoy the restful night, sleep deeper ·        PRODUCTS DIMENSION -Please check the size before your purchase. Frame material: TR90, Lens width:53mm, Frame width:131mm, Lens height:47mm, Bridge (DBL): 18mm, Temple length:142mm,Head size: Medium,classic Aviator eyewear frame is super lightweight(12g),comfortable to wear and fit well ·        LIFE TIME WARRANTY- 100% risk free to try, unsatisfied glasses can be refunded within 90 days of receiving. Customers will enjoy lifetime warranty( not man-made damage).In case of any problem happening, just contact us without any hesitation until you are satisfied. Show more