Burberry BE4191 are round shaped sunglasses made of plastic acetate material which is both lightweight and durable. The lenses are completely U.V. protecting. Burberry BE4191 are available in size 57x21. designerglasses.co.uk offers this frame in various colours including: Burberry BE4191 36654L Green Havana/Blue Havana/Light Grey Gradient Blue. designerglasses.co.uk is one of the oldest optical sites on the internet.