Bassdrum muffler made from polyester foam. Thanks to special construction the kicker dampens the rear and front bass drum head at the same time. Bassdrum then features clear sound in low frequencies, while muddy mid frequencies are being absorbed. Kicker 2.0 offers the opportunity to place the Shure Beta 91 A (not included) boundary microphone on the muffler and attach it with velcro tape. Dimensions are 20" X 17". Product comes in anthrazite finish.