Good: Rogue HG Bumpers: Virgin rubber bumpers with stainless steel inserts.
Better: Rogue Hi-temp Bumpers: Made in the U.S.A. from recycled rubber with stainless steel inserts. Completely indestructible.
Best: Rogue Training Bumpers: The bumpers used at the CrossFit Games. Competition grade bumpers. Thinner so you can fit more weight on the bar.