The Alpinestars GP Plus V4 Rideknit leather motorcycle jacket is Tech-Air compatible. Fully CE-certified riding garment to CE Certified Category II EN 17092-3:2020 Class AA, it features CE Level 1 Category II EN 1621-1:2012 Nucleon Flex Plus shoulder armour and CE Level 1 Category II EN 1621-1:2012 GP-R Lite Elbow armour. It is made from premium Flex Plus bovine leather with Alpinestars Composite Stretch Plus material. It also offers Alpinestars Rideknit engineered inner arms which combines high abrasion and tear resistance with high flexibility, comfort and mechanical stretch while still delivering superior comfort and high levels of breathability. The GP Plus v4 Rideknit jacket also incorporates Alpinestars Composite Stretch Plus, A-CS Plus, and material on the jackets 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 jacket has lightweight and breathable perforated Flex Plus race leather for optimal ventilation, especially when the jacket 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.