Bolle Junior Piranha Sunglasses, TNS, Matte Blue Anti-Slip Nose Piece Anti-Slip Temples Light yet offer good shock resistance Made from B88 nylon UV400 lenses Finest grade nylon is utilized in our frames to create lightweight, incredibly durable and ultimately flexible frames The only prescription program which ensures optimum precision, comfort and frame balance for sports sunglasses Our polycarbonate lenses are 20 times more impact resistant than glass and three times lighter