Two shoulder, knee, and elbow pads are cut and shaped to fit the pockets of the Roadcrafter and Darien. TF3 is standard issue for the Roadcrafter and Darien Jacket, and offers the most impact absorption. TF2 is a softer option for more comfort with slightly less impact energy absorption. The Darien style pads come in a Supernyl fabric sleeve with pre-installed hook & loop for installing these pads into non-Aerostich garments. S, M, L.