The GP Tech V4 Suit features an outer shell twill material developed exclusively for Alpinestars which is combined with an innovative, aramidic base knit lining for optimum levels of comfort, protection, and lightweight. Ventilation levels are further enhanced by the breathable panels on the sides of the suit. The GP Tech v4 also incorporates lightweight stretchable panels on the lower back, elbows, crotch, and knees to provide drivers with greater levels of flexibility and freedom of movement both in and out of the car. GP Tech V4 Suit