Reduce the over-ring without over muting the natural strike tone of your drum. These won't fall off during performance or leave residue. Can be used on any head on your drum kit, even vertical and upside down, providing limitless versatility Are re-usable and re-newable. If they get dirty, rub with a drop of baby oil, then wash with soap and water. Good as NEW! Never lose their shape, or melt, on stage or in the package. Winner of the NAMM U Best in Show Award for 2017 as a top 6 product out of thousands