The exclusive A1000 glasses are made to Napier's exacting safety specifications, the frame is light and close fitting, non slip arms and nose piece, unique arm tension coils allows frame to mould to the contours of your face. Weight 23 grams. 5 interchangeable lenses in Sodium Yellow, Smoke Grey, Bronze, Vermillion and Lilac. Every possible lighting condition is catered for, all supplied in zip case plus a drawstring bag & cleaning cloth.