The Caliber Leather Jacket is made from durable premium leather which incorporates strategically positioned stretch zones for fit and ventilation intakes for internal air cooling. With class-leading protection and the ability to upgrade to Alpinestars Nucleon chest and back protective system, the CE-certified Caliber Jacket is ideal for road riding. Accordion leather stretch inserts on waist, elbow and rear shoulder for an enhanced range of movement. Durable premium leather main chassis constructed from 1.0 – 1.2 mm high grade leather. Localized perforations offer excellent ventilation and internal airflow. Low profile collar construction with microfiber comfort edging plus 3D textured fabric inner collar lining for comfort. Pre-curved sleeve construction reduces fatigue and improves overall fit. Strategically positioned stretch panels on sleeves and chest for improved fit and feel. Two zippered hand pockets plus inner waterproof wallet pocket. Zippered air intake vents are strategically positioned for optimized airflow when opened.