Barton Perreira Norton Sunglasses pair refined eyewear craftsmanship with a clean acetate frame and marine-blue lenses, designed for everyday sun protection and prescription use. Key attributes: Crystal | Blue | Acetate | UV protection | Non-polarised lenses | Prescription-ready | Includes protective case | Round frame | Encircled (full-rim) design | Dimensions & fit: Lens width: 50mm | Bridge: 21mm | Composition & care: Acetate | Wipe lenses with a microfiber cloth. Store in the supplied case when not in use.