The Alpinestars GP Tech suit is FIA 8856-2000 Approved and was developed in conjunction with F1 teams. Lightweight and highly breathable 300g/sqm 3-layer 100% Nomex construction. The underarm is breathable through the use of an AC fabric that increases airflow, reducing perspiration and gives more freedom of movement. The back collar also constructed of AC fabric to increase airflow while wearing HANS device. Full floating arm constructed with knit fabric that stretches in all directions, whilst the specifically shaped arm patterns and shaped three panels leg construction helps with an ergonomic fit in the driving position. Lumber stretch panel provides superior flexibility. Internal flat seams reduce internal pressure points and added comfort.