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, on the torso for exceptional breathability, comfort, and freedom of movement. A-CS® Plus panels are approximately 9% lighter than traditional leather accordion panels and offer superior stretch performance with about 30% elongation. They also provide an increase in tear resistance of 300% and cut resistance by 600% compared to leather. The jacket is constructed from 1.3 mm ‘Race’ grade leather for an optimal blend of abrasion resistance and comfort. The inner arms feature RIDEKNIT® engineered fabric, which combines high abrasion and tear resistance with flexibility, comfort, and mechanical stretch, ensuring superior comfort and high levels of breathability.