Sport Prescription Glasses and Goggles – 3 Interchangeable Antifog Lenses - Removable Clip for Pescription Lenses - Interchangeable Arms and Strap – AF399 by Bertoni Italy:  Frame: mat black anticrash polycarbonate - thanks to their excellent grip at arms, at the adjustable nose pads and moreover with the elastic strap,  this sunglasses will stay in place. - Included a Removable Optical Insert for Prescription lenses - any strength friendly – Your optician can easily assemble your prescription lenses to the clip – Prescription sportsunglasses for Cycling MTB Basket Tennis Football Motorbike Etc.  - 3 Lenses Included - Smoke - Yellow - Clear - adapt in any weather conditions, outdoor and indoor. - Interchangeables arms with elastic adjustable strap to have a very skin tight fitting making sports - black hot printing logo. - The inside of the front frame is covered with a removable windproof soft foam for a comfortable fitting, specially when used with the strap. - Wraparound design: protects the eyes from wind and bad weather, provide enhanced peripheral vision - Size: suitable for all types of faces (narrow to large).