The Head Radical S is made from Graphene XT which makes it very light weight and easy to hit shots. The racket is even easier to hold. The Radical S has a larger sweetspot with its 102 Sq.inch head. The Dynamic String Pattern. The racket is also highly maneuverable and comes handy. This is a great option for somebody who wants a good control over the racket without much control. The Racket is compatible with the Sony Smart Tennis Sensor. It has a 16/19 string pattern.Control is excellent thanks to the Dynamic String Pattern which features tighter string spacing in the contact zone for more directional control.