Explosive power is combined with the touch to play delicate drop shots in the BOOM JR. Ambitious juniors aged from 9 to 11 can play modern tennis with a racquet that has been enhanced with the introduction of Hy-Bor, a state-of-the-art material mix that is mainly used in the high-tech aerospace industry. Adding that material to the shaft has improved the racquet 's perceived stability and power. Endorsed by Coco Gauff and Lorenzo Musetti, this model has a construction that is based on the adult racquets BOOM MP L and BOOM MP, with smaller dimensions to suit up-and-coming juniors. With the power, confidence and fun that comes from playing with the BOOM JR, juniors don't have to think about anything else but enjoying the moment and hitting their next shot. Like the adult BOOM frames, the BOOM JR comes in a vibrant blue design inspired by HEAD 's iconic ski racing collection. This racquet will help kids to feel good about themselves and their tennis. Head Boom Jr. Tennis Racquet Junior - Strung | Blue | Christy Sports