Engineered for an optimized women's specific fit, the Stella Dyno Leather Jacket is Alpinestars modern interpretation of a heritage jacket, and combines premium leather and a regular fit to create a jacket that looks great, on and off the bike, in any setting. This jacket is also equipped with a detachable thermal vest, which adds to its performance and versatility. Detachable thermal vest with 80-gram insulation at the front for effective cold weather performance. Shoulder and elbow armor protectors are engineered with a low profile for a more tailored fit. Low-profile elbow protectors for a more stripped back and elegant aesthetic. Tech-Air® 3 Ready (sold separately). Constructed from 1.0 - 1.2 mm bovine leather for the optimum blend of light weight, thinness, suppleness, and abrasion resistance.