Golf, as with all sports, requires various items of equipment some being an absolute requirement and others can be classified as supportive items. The essentials, namely golf clubs, balls, tees and golf bag are carried by the golfers during a round of golf. A supportive item would be an electric golf trolley. Although handicap and club golfers can  carry their golf clubs and balls in a golf bag slung over the shoulder this is not conducive to maintaining good posture and successful progression in the sport.