Premium leather main chassis constructed from 1.3mm genuine bovine leather with High Resistant Stretch Fabric (HRSF) strategically positioned for comfort. Alpinestars Nucleon Flex Plus armor on shoulder and elbow (Alpinestars Nucleon back protector and Nucleon KR-Ci chest protector available as an accessory upgrade). Accordion panel on back and shoulder with HRSF polyamide stretch material on sleeve for an optimized fit and performance. Waist adjustment for the highest level of comfort. Low profile collar with soft edging and 3D mesh inner comfort fabric for enhanced rider comfort. A premium full grain leather jacket fully optimized track and performance riding, the GP Plus R v3 Leather Jacket is anatomically profiled to ensure excellent comfort and a performance fit. Packed with class-leading, track-tested protection such as Alpinestars Nucleon Flex Plus armor on the shoulders and elbows for superior impact protection, this jacket is equipped with stretch panels on the shoulder and back for an optimized fit.