The Helmets are manufactured using interior padding of suspended leather straps and ear hole cutouts.
The ZH's revolutionary design cradled the skull within the helmet, replacing the former foam shell. Fabric straps crisscrossed the interior, absorbing and distributing impact more effectively while allowing for improved ventilation. The suspension innovation acted as a shock absorber to lessen the blow of effects. Companies like Rawlings and Spalding manufactured this breakthrough invention. It was famously worn by Zuppke's star player Red Grange and others.
Though suspension straps are no longer used in modern football helmets, Zuppke's design has stood as a standard application for almost six decades.
The concept is still an integral part of some construction hard hats and other safety headgear, leading it to stand the test of time.