Originally born in 1988 under the innovative mind of Tinker Hatfield, the Air Trainer 3 was designed to encompass every facet of training that was needed at the gym. Essentially made to be the Swiss Army Knives of trainers, this model features a leather base with a heel and forefoot TPU cage that features a strap for stabilization at the toebox. The colorway is inspired by the patina of vintage medicine balls after years of use. A visible air bubble unit was the final touch of its forward-thinking prowess. The NIKE Air Trainer 3 PRM - "Medicine Ball" is available now for email order at the New KITH Shop and KITH Brooklyn.