Description Slou. Acetate sunglasses available in two colors, black and translucent gray. Square shape, and acetate paddle-type temples. Size Guide Lens Width (Caliber) 54mm Bridge Width 17mm Temple Length 145mm Materials Organic cotton acetate and wood pulp, hand-crafted. Stainless steel soul. Reinforced steel hinges with five teeth. The type of lens is your choice at the optician. 100% UVA UVB 400nm sunglasses. Base 4 flat lens curve. Hardened treatment on the lens and anti-reflective on the inner surface with blue reflection. Exchanges and returns 2-year replacement guarantee 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. Slou is a flawless prescription eyeglasses design. With a sports glasses design, with aerodynamics that adjust to the features of the face. 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 thin and therefore very light.