These Alpha Bumpers are no joke!! Arrived quickly and were flawless upon unboxing. The dead bounce on these is the best I have experienced and they are noticeably softer upon impact and quieter than other bumpers. Especially helpful in a home gym set up while training early in the morning with kids asleep. One thing I was very impressed by was the low odor from the rubber, most bumpers wreak for quite some time after unboxing, These Alpha’s had a slight odor upon arrival, and 10 days in the smell is gone. Well done Vulcan! I will be back for more Alpha bumpers as more sizes become available.