The Booty Block! you know the drill... you want the skinny chopper with a microscopic rear seat, they look great! but when you try to take a passenger on the back of your chopper you make it 2 pot holes and a driveway approach into the ride and your person is like YO! turn this ship around!!!!!!!! Save the jackhammering for the bedroom! This seat is pleated black vinyl with gripper material on the inside that will keep it from slipping around while you ride. the seat works great on most chopper seats. the design makes it grip the sides of the seat or P Pad as you sit on it. 8.5X8.5 with a 3.75in channel (don't worry if your seat is slightly wider this will just make the sides grip your seat even harder when the passenger sits on it)