One of Bauer's most successful, and long lasting helmets is the 4500. This helmet recognized and worn by many at the professional level. It features a dual-density foam liner which is simple, but protective. No fancy features take away from the sleek and simple design. All it takes is a screw-driver to adjust the helmet to find the proper and secure fit. The 4500 remains one of Bauer's most light-weight models to date.