The foam cushions on the rear support poles often get beat up. Usually, the covers are intact but scrunched up on the bottom of the pole or around the remaining cushion. The foam itself can easily be replaced with Self-Stick pipe insulation from Home Depot (available here
). Note that the linked insulation is for a 1" diameter pipe and ParaParaParadise has almost 2" diameter pipes. I got around this by cutting one insulation length in half down the center and using it to fill in the extra spots. If you are careful, the pipe insulation will stick properly to itself giving you a snug fit and a perfect sphere. Make sure to trim the insulation to the length of the covers before applying.