Brunello Cucinelli Alke Sunglasses feature a soft square tortoiseshell acetate frame with refined metal detailing for elevated everyday sun protection. Key attributes: Tortoiseshell | Acetate | UV protection | Crystal lenses with base 4.25 | Non-adjustable nose pads | Prescription-ready (RX-able) | Soft square frame silhouette | Decorative metal inserts on front and temples | Sculpted temples | Dimensions & fit: One size | Universal fit | Composition & care: Acetate frame | Crystal lenses | Metal hardware | Clean lenses with a microfiber cloth; avoid abrasive cleaners and harsh chemicals; store in the protective case.