Intense research and development, and extensive testing, have gone into developing the HEAD RESET Ball, a more sustainable choice for coaches and recreational players. As part of HEAD's RETHINK project to help reduce the sport's environmental impact, this semi-pressurized and durable ball has a special compound that includes pre-consumer recycled material. The special compound extends the life of a ball that has 50% lower air pressure than standard tennis balls. The 4-ball carton is made from 100% recycled materials and, instead of paper coating, the colors are printed directly on to the carton.