Words from the manufaturer:
Split the grid in the Wireform jacket. The chassis on this three-season jacket comes with slightly pre-curved arms, ideal for the sportbike riding position. Comfort molded neoprene collar, unique reinforced grid chassis, and a full D3O® (shoulders, elbows, and back) package speak to the Wireform’s riding pedigree. Reflective hits provide visibility in low-light conditions, while a removable insulated SatinCore™ liner extends your riding season deep into the fall.