Currents may also be generated by density differences in water masses caused by temperature and salinity variations. These currents move water masses through the deep oceanâtaking nutrients, oxygen, and heat with them. Occasional events also trigger serious currents. Huge storms move water masses.
Ray-ban and most other manufacturers frames are made from Plastic compounds. Ray-ban used to make all its glasses out of 'glass'. Now it makes its sunglass products out of scratch resistent plastics. Often they will 'feel' like glass but are in fact most usually plastic production.
for your information Ray-Ban Sunglasses, style RB 3025 Aviator Large Metal is a stylish and classic metal aviator frame. The RB 3025 is designed with plastic temple tips for maximum comfort. Featured on the temples and on the right lens is the signature Ray-Ban logo.