This suit has an engineered fit to deliver the highest level of active race protection and is Tech-Air ready; it can accommodate the Tech-Air 5 (sold separately). An engineered fit designed to accommodate any Alpinestars Tech-Air System in order to deliver the highest level of active race protection. Tech-Air ready (sold separately). Innovative MATRYX structural panels on the abdomen provide parametric performance for ventilation and superior mechanical resistance to tearing and abrasion while also being extremely thin and lightweight. DFS sliders and replaceable DFS elbow sliders deliver optimal resistance against impacts and abrasion, and offer exceptional friction control. Polyamide stretch inserts for abrasion resistance and enhanced freedom of movement. This suit has an engineered fit to deliver the highest level of active race protection and is Tech-Air ready; it can accommodate the Tech-Air 5 (sold separately). An engineered fit designed to accommodate any Alpinestars Tech-Air System in order to deliver the highest level of active race protection. Tech-Air ready (sold separately). Innovative MATRYX structural panels on the abdomen provide parametric performance for ventilation and superior mechanical resistance to tearing and abrasion while also being extremely thin and lightweight.