Product Details [Target User]: Unisex [Material]: Plastic [Features]: comfortable [Certification]: 1.DROP BALL TEST 2.Certification of FDA Registration Service Lens prescription table for reference +1.00 for 40-45 years old +1.50 for 45-50 years old +2.00 for 50-55 years old +2.50 for 55-60 years old +3.00 for 60-65 years old +3.50 for 65-70 years old +4.00 for over 70 years old [TIP!]If you have any question about our product, please contact with us, we will be happy to serve you. Thank you so much for support us!