Heat Wave Quatro Performance: FirestormIntroducing a complete evolution in product Weve taken our ultra sleek Quatro frame and given it a complete overhaul, finally making them Z87+ featuring new performance arms, with an integrated Quick Latch side shield system. In the comfort department you will find rubberized touch points throughout the frame also ensuring that the frames stay in place on your face. The cherry on top of the performance line is a lens matched side shield melds form and