Alpinestars Jacket DynoEngineered 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 g insulation at the front for effective cold weather