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.
GatorZ makes sunglasses of 7075 Billet Aircraft Aluminum right here in the good olâ USA. Their aluminum frames completely surround each polycarbonate lens. And their new Magnum Z model just made history by becoming the first-ever American-made aluminum sunglass to meet the ANSI Z87+ high-velocity impact rating.