The Shock Doctor Ultra ShockSkin Goalie Shirt are the lightest and most breathable protective shirts on the market. The Ultra Shockskin Goalie Shirt provides additional protection where your chest protector leaves gaps. The collar bone, back of arms, and ribs. This shirt feature Shock Doctor’s proprietary ShockSkin technology. Unlike other foam pads that lay flat, Shock Doctor utilized specifically placed channels and flex points so ShockSkin pads will flex and contour with your body through every movement and save.