Comfortable fitting
The soft silicone buds are the best.  They can be shaped to fit the form of your ear giving an almost 100% noise reduction.  It's simply the best noise blocking bud I've ever used.  I do deal with a lot of noisy machines, in my shop and these are better than anything else I've ever used.  The bonus is you can even use them over your overhead earmuffs.  Simply incredible.  The other included buds are pretty good, but I'm all about the form fitting ones.
Rating: 5 stars