Not as good as the orange ear plugs TSC was carrying a few years back that were more bell-shaped. No matter what I do, how far I stuff them in, these just won't seal off much noise. After using them on the tractor for a few hours, my ears are ringing. For me, they are ineffective because they just aren't large enough to seal. I can hear almost as well with them in as I can wearing nothing.

I were these bush hogging, running a chainsaw, and weed eating (all on professional levels). These are excellent plugs, and can be tossed right into the washing machine with a load of clothes to keep them sano.