The GP Plus R V4 Airflow jacket is engineered & optimized for maximum ventilation & airflow & features extensive race-derived features & materials including a dedicated ‘ Sport’ fit with pre-curved arms for maximum riding performance, & race-proven protection on the shoulders & elbows. Vented shoulders & extensive perforation zones on the chest & sides for maximum airflow. Alpinestars composite stretch technology, A-CS® Plus, stretch panels on the torso for exceptional breathability, comfort, & freedom of movement, as well as delivering a lighter weight & a lower profile than a traditional leather accordion panel (the A-CS® Plus panels are about 9% lighter than leather panels). Another key advantage of using A-CS® Plus is its superior stretch performance, A-CS® Plus has about 30% elongation & offers an increase in tear resistance of 300% compared to HRSF (Hyper Resistant Stretch Fiber), & an increase in cut resistance by 600% versus leather. 1.3 mm " Race" grade l...