Water Ball Zorbing

The best water balls are constructed from polyvinyl chloride (PVC) 0.6–0.7mm thick. Thermoplastic polyurethanes (TPU) are the best choice for use in cold weather or on snow. Some lower priced water balls are made from a PVC–TPU mix. More expensive balls use 100% TPU. They are typically made in China, and come in various sizes. A typical water ball stores flat and weighs 15 kilograms, and can be inflated in under a minute with a good air pump. Some models also have hand grips on the inside or outside, and the surface can be printed on.
Zorbing
Zorbing (globe-riding, sphereing, orbing) is the recreation of rolling downhill in an orb, generally made of transparent plastic. Zorbing is generally performed on a gentle slope, but can also be done on a level surface, permitting more rider control. In the absence of hills some operators have constructed inflatable, wooden or metal ramps. There are two types of orbs, harnessed and non-harnessed. Non-harness orbs carry up to three riders, while the harness orbs are constructed for one to two riders. Double-harness spheres have different slope requirements, and must only be operated in specific locations. The longer runs are approximately half a mile. The first zorbing site was established in Rotorua, New Zealand, by David and Andrew Akers.