Description: TR90 material, super toughness and more ultra LIGHTWEIGHT(about 0.03 lb), elasticity for all faces, unbreakable. Super lightweight, as good for reading books. Anti bluelight & UV, effectively protect your eyes from computer radiation damage. Product Specification: Product name: Blue Light Blocking Reading Glasses TR90 Material : TR90 + AC Lense Diopter available: +0 / +1 / +1.5 / +2 / +2.5 / +3 / +3.5 / +4 Arm: 5.55" (approx.) Lens height: 1.30" (approx.) Total Frame: 5.51" (approx.) Glasses Weight: 0.03 lb (approx.) Packet Weight: 0.06 lb (approx.) Color : Black & White Package includes: Bluelight Blocking reading glasses*1, microfiber pouch*1, EVA pouch*1, glasses cloth*1 Warm Tipp: To avoid damage, never clean your reading glasses with tissues, towels,clothing or alcohol, and also avoid using household detergents or soaps. While a few mild soaps don't harm lenses, now some extra strength soaps are powerful enough to slowly disintegrate lens coatings.