The Alpinestars GP Plus V4 one-piece leather motorcycle suit is Tech-Air compatible. Fully CE-certified riding garment to CE – Category II EN 17092-2:2020 standards – AAA class, the GP Plus V4 suit features Alpinestars Nucleon Race shoulder armour, GP-R elbow, forearm, knee and shin armour and Bioflex hip armour all CE Category II Level 1 EN 1621-1:2012. It is made from premium Flex Plus bovine leather with Alpinestars Composite Stretch Plus material, Matryx, HRSF, and GP DFS sliders. The GP Plus v4 also incorporates Alpinestars Composite Stretch Plus, A-CS Plus, and material on the suit’s side torso and shoulder blades, offering lower weight and increased flexibility and freedom of movement. With A-CS Plus, the stretchability ratio provides 20% additional elongation, and the tear resistance is increased by 300% versus leather. Another benefit of using A-CS Plus is that it offers high breathability with a lower weight and lower profile than leather accordion panelling. The GP Plus v4 has lightweight and breathable perforated Flex Plus race leather on the suit’s torso for optimal ventilation, especially when the suit is worn with Tech-Air Airbag Systems like the Tech-Air 10 or Tech-Air 5. The GP Plus v4 is also fully Tech-Air Ready for use with the Tech-Air 5 or Tech-Air 10 Airbag Systems and provides a convenient pocket on the forearm for the Tech-Air 10’s remote LED panel. The GP Plus V4 also has a detachable comfort liner with biostatic Polygiene treatment to keep it feeling and smelling fresh.