With a range of track-tested performance and protection innovations, the SP-1 Jacket is constructed from premium leather and incorporates strategically positioned leather accordion and poly-textile stretch panels for an excellent sport riding fit while offering comfort and flexibility. The SP-1 v2 Leather jacket comes with a removable full sleeve thermal liner allowing it to be worn in a variety of weather conditions. Features Premium leather main chassis constructed from 1.3mm genuine bovine leather. Stretch panels on sleeves, side, chest and shoulder blades further improve fit and feel. Waist adjustment for an improved riding fit. Two zippered hand pockets for practicality. Printed logos and graphic details reduce weight and improve the flexibility of the leather, thus enhancing comfort and performance. Zippered air intake vents are strategically positioned for optimized airflow. Low profile collar construction with microfiber comfort edging plus 3D textured fabric comfort inner collar lining for high levels of rider comfort. Pre-curved sleeve construction reduces riding fatigue. Chest and back compartments are designed to accommodate the Alpinestars Nucleon chest and back inserts, available as an accessory upgrade. Multiple snap button system to integrate the Level 2 certified Alpinestars Nucleon Back protector. Waist connection zipper allows attachment to Alpinestars riding pants. Waterproof inner wallet pocket for peace-of-mind storage. Inner removable thermal liner for added versatility. certified Bio Armor on the shoulders and elbow protectors for enhanced levels of protection. GP Lite external protection on the shoulders offers additional impact protection. Fully certified riding garment to Category II prEN17092 draft standards – A class.