The RTOM Moongel Percussion Dampening Gels are a wonderful and easy way to control unwanted resonance and overtones. Move the pad around on the surface of your drums or cymbals to create the desired tone. These washable pads are made form a soft nylon gel. They are self-adhesive and retain their stickiness for years. The RTOM Moongel Percussion Dampening Gels come in a 4-pack plastic carrier.