These shop jackets are made of sturdy twill and have a quilted nylon lining. The his and her jackets also include insulated sleeve cuffs to prevent the wind from shooting up the arms and inflating the back of the jacket. The hidden buttons underneath the collar prevents them from slapping riders in the face. Wanna stock up? Call your Drag Specialties rep or learn more about the Throttle Threads lineup at www.throttlethreads.com.