First, DO NOT use it in the sun or in a hot enviroment! Heat makes this a nightmare. Becomes sticky and gelatin-like, so watch out! Otherwise, using them is easy, basically idiot-proof. The different sizes make the altering of sound a breeze. Use on the 8"-12" toms the smallest one, 13"-15" the medium one and the big one from there. This way you still have some sustained boom, but it will be controlled. In other words, you retain the full bodied boom sound, but in a controlled amount. I use them sometimes on the inside part of the batter head, so heat and dirt can't interfere with them, and it stays there even after considerable time of playing. If I use them on the top of the heads, I tend to leave the plastic separator "coins" on them, so not many dirt can stick to them. Comes in green and clear, but I use green only. This way I know if I have them on or not. :)
