sphering

Sphering is an adventure activity in which participants enter a large inflatable ball, typically made of transparent plastic, and are rolled or driven downhill or across water inside the sphere. The ride occurs as gravity moves the sphere along a slope or a prepared course, with an air gap between inner and outer layers to provide cushioning.

The concept is most commonly associated with the sport known commercially as zorbing. It gained prominence in the 1990s and has since been offered at adventure parks and tourist destinations around the world. Variants include downhill sphering on hills, and hydro-zorbing or water sphering, where the sphere travels on a lake or pool surface.

Equipment and configurations generally involve two nested plastic layers forming a single ride chamber, an air cushion between the layers, and a rider seated or lying inside the inner chamber. Some setups use a harness or seat to secure the rider, while others allow more free movement. Operations may offer single-rider or multi-rider experiences, with additional attachments or sensors in some models.

Typical procedures involve a safety briefing, donning appropriate clothing and footwear, and then entering the sphere at a designated station. The operator seals the sphere and guides it along a track or water course. Experiences vary in duration, location, and whether the ride is downhill, on flat land, or on water.

Safety and regulations emphasize risk awareness, with operators providing safety gear and supervision. Participants with certain medical conditions, injuries, or pregnant individuals are often advised against sphering. Age, weight, and height limits, along with local rules, influence eligibility.

See also: zorbing, hydro zorbing, adventure sports.