Description Rob. Glasses with mint-tinted smart lenses. Round shape, and acetate paddle-type temples. Size Guide Lens Width (Caliber) 44mm Bridge Width 24mm Temple Length 145mm Materials Organic cotton acetate and wood pulp, hand-crafted. Stainless steel soul. OBE riveted hinges, reinforced with five to seven stainless steel teeth. Photochromic lenses with mint tint (30%-80% opacity) Exchanges and returns 2-year replacement warranty on spare parts. 30 days to return the product free of charge. Pick up at the requested address. Refund via the same payment method used. Rob is a flawless prescription eyeglasses design. This is a highly recommended prescription frame for any type of prescription. Available in three frame colors, each one more spectacular than the last. The shape has a 3D architecture, creating the effect of wide-framed glasses, but at the same time, they are thinner and therefore lighter.