Great for additions of pellet hops during the boil! The ultra-fine mesh fabric keeps a majority of hop material from entering your fermenter. It also works well for dry hopping in the keg, with pellet or whole hops, where it retains most all of the hop matter. Note: Dry hopping with pellets in a keg, using this bag, will throw a little matter into your beer, but it settles out pretty quickly and we have had good luck with this procedure. Perfect size for 1-4 ounces of pellets and 1-2 ounces of whole hops.