The GP-T Suit is made from 2 layers of lightweight Nomex fabric for comfort and breathability. The standard features built into the GP-T are the same features as suits the cost twice as much. The Alpinestars GP-T has a lightweight internal knit fabric layer which makes this suit extremely comfortable and the telescopic panel construction make for a perfect fit. Full floating arm constructed with stretch knit fabric. Specifically shaped shoulder, arm and leg pattern for an ergonomic fit in the driving position and lumbar stretch panel to add comfort.. Boot cut legs with hidden Nomex inner cuff are standard on all Alpinestars GP-T suits.