The Kaleos Callahan Eyeglasses pair the brand's signature craftsmanship with an oversized square silhouette, offering durable acetate construction and a comfortable everyday fit. Key attributes: Black | Acetate | Durable acetate construction | Prescription lens compatible | Built-in acetate nose pads | Display/demo lenses included | Supplied with protective case and cleaning cloth | Oversized square shape | Modern silhouette | Dimensions & fit: Oversized fit | Composition & care: Acetate | Wipe lenses with a microfiber cloth and mild lens cleaner; store in the included case; avoid abrasive cleaners and extreme heat.