Boom'r Bonnets are the black things on top of members of the Boom'r Band's head. It is unsure if the bonnets are hair or hats, but the name implies that they are a hat. Boom'r Bonnets can also be adjusted to make different noises when hit by Mystery Pods. There is also a white stripe that squiggles up the middle of the bonnet. This stripe could be related to the Boom'r Band's brain.