GP Plus R v4 Airflow Leather Jacket is engineered and optimized for maximum ventilation and airflow with extensive race-derived features and materials, Sport fit with pre-curved arms for maximum riding performance, and race-proven protection on the shoulders and elbows, Vented shoulders and extensive perforation zones on the chest and sides for maximum airflow, Alpinestars composite stretch technology, A-CS? Plus, stretch panels on the torso for exceptional breathability, comfort, and freedom of movement, as well as delivering a lighter weight and lower profile than a traditional leather accordion panel (the A-CS? Plus panels are about 9% lighter than leather panels), A-CS? Plus has superior stretch performance with approximately 30% elongation and offers an increase in tear resistance of 300% compared to HRSF (Hyper Resistant Stretch Fiber), and an increase in cut resistance by 600% versus leather , Extensive technical stretch panels under the arms, on the inner arms, and around the neck for an optimized sport fit, Stretch, soft feel, and ergonomic collar for superior rider comfort with hook-and-loop neck closure with the large built-in flap for a secure closure, Ergonomic hook-and-loop cuffs with a zippered sleeve on the forearm for ease of use, Two zippered external side pockets for practical and secure storage, Mesh interior comfort liner with pockets to accommodate a back protector or a split chest protector, Cut longer in the back for better coverage when in the riding position, Hook-and-loop adjustable waist and mesh liner, Dual density DFS shoulders for superior friction control, GP Lite elbow armor for additional impact and friction control in a key area, Nucleon Flex Plus shoulder armor for superior impact protection, Tech-Air? 5 and Tech-Air? 3 Ready