The oversized Knockerball is here! Jump in, roll around or get strapped in for some total fun. The human hamster ball also known as a zorb is great for any party – it can be used indoors or outside – branded in Knockerball colors, we offer this with red ropes and even your own logo! Our TPU material is lighter and more durable than PVC. Weight is 123 lbs / 56 kgs.