Product Details The Jetter Ebony is made from reclaimed ebony wood-infused carbon fiber veneers to ensure maximum durability. These temples are produced with black acetate tips making the frame adjustable. Jetter Collection: Lenses - 52mm, Bridge - 21mm, Temple - 143mm Care Details When not in use, glasses should be placed in their case or pouch. Store glasses in a safe cool place after use. Be mindful when exposing glasses to extreme temperatures. Use both hands to remove/put on glasses. This ensures that alignment of glasses is not affected. Wooden portions of the product should be cleaned with any natural oil at least every 6 months. .