MotoGP ear plugs decibels reduction?

does anybody know what ear plugs motogp riders use and the specific number of decibels reduction as I am looking in to investing in better ear plugs than I currently have

does anybody know what ear plugs motogp riders use and the specific number of decibels reduction as I am looking in to investing in better ear plugs than I currently have http://ifttt.com/images/no_image_card.png