Cycle Sunglasses for Bike Cycling MTB Running - Antifog Interchangeable Lenses by Bertoni Italy - AF900 AF900 sport sunglasses by Bertoni Italy. Frame and temples made in Nylon TR90LX, stress-resistant impact-resistant and extremely light. These characteristics are due to the chemical composition of this material unique in its kind, 70% Nylon 30% Carbon. It is 20% lighter than conventional nylons and offers greater resistance to shock and traction. It offers a greater resistance to high temperatures without deformation. Due to its flexibility and strength the TR90LX is the safest material for sportive use in optical, in fact, the resistance of the head frame of accidental collisions has demonstrated a strong structural integrity. This special material also ensures an exponential increase of the frame duration in the time. The nose-pad is adjustable in order to offer a perfect fitting. Lens are treated by a special antifog resin. Sold with 2 lenses included: one for sunny day and one for medium and low brightness. Packing : cartoon - cord - microfiber case cleaner. Bertoni provides lifetime after sale service for all Bertoni goggles and sunglasses. BERTONI ITALY - GOGGLES & SUNGLASSES Bertoni is a well known italian brand of sport sunglasses and motorcycle goggles coming from a thirty-years experience in the sport–optic market of his technicians. The Motorcycle Sunglasses and Goggles by Bertoni are well appreciated because of their comfortable and well fitting design plus the latest technical discoveries for lenses and materials.  Cycling and Running Sunglasses, thanks to the wrap-around design that improves peripheral vision and protects your eyes from wind and weather and thanks to photochromic lenses that adapt to changes in light, making them unique and indispensable in any weather condition, allow Bertoni to stand out also in these disciplines. The wide range of models have been developed to suit all kind of sports: motorcycle sunglasses, cycling, running, parachuting, fishing, watersports, skiing, golf, beach volley, horse riding, tennis, shooting and many others.The Bertoni sunglasses and goggles are made respecting the regulations with a strict quality control in particular when choosing the best lenses and materials