Tr90: TR90 is thermoplastic material produced in Switzerland it is incredibly durable| flexible| and lightweight Polycarbonate: Polycarbonate is lightweight| comfortable| impact resistant| and provides UV protection. Rimless nylon shield lens offers widest field of vision and unobstructed view. Impact resistant and no cracks| no chipping during lens glazing.Ventilation and/or top-bar engagement slots. Double-molded clip-on bridge with adjustable nose pads. Fully adjustable endtip with metal core covered with anti-slip| non-allergenic rubber for maximum snug fit. Shield lens(w/ 7-base front curve) pre-cut with eye opening when ex-factor with standard nylon groove (0.7x0.7mm groove size| 7 to 8-base groove curve). Frame| lens color designs inspired by pro cycling team jerseys.
