Alpinestars - Blacktrack Leather JacketThe Blacktrack Leather Jacket is Alpinestars modern interpretation of the classic biker jacket, and combines premium leather and a tailored 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. Constructed from 1. 0 1. 2mm bovine leather for the optimum blend of light weight, thinness, suppleness, and abrasion resistance.