The GP Plus R v4 RIDEKNIT® Leather Jacket is optimized for superior freedom of movement and rider comfort. It features extensive race-derived features and materials, including a dedicated ‘Sport’ fit with pre-curved arms for maximum riding performance, and race-proven protection on the shoulders and elbows. This jacket utilizes Alpinestars composite stretch technology, A-CS® Plus, for exceptional breathability, comfort, and freedom of movement. The A-CS® Plus panels are lighter and offer superior stretch performance compared to traditional leather accordion panels. Key features include 1.3 mm ‘Race’ grade leather construction for optimal abrasion resistance and comfort, and RIDEKNIT® engineered inner arms for high abrasion and tear resistance with flexibility and breathability.