There are two types of orbs. 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. The Guinness Book of World Records recognizes two sphereing records, set over two consecutive days in 2006. Zorbs have been adopted as a symbol of the 2014 Winter Olympics in Sochi, Russia.