Tuff-Caps are the revolutionary solution to the lack of game-legal protective headgear in water polo. Designed to look nearly identical to standard water polo caps, the Tuff-Cap fits snugly to the head and adds a big boost of protection from head impact forces. Tuff-Caps feature a thin layer of an advanced, rate-dependent material called Poron XRD®. Soft to the touch, but tough on impact, XRD® Technology is the proven choice for ultimate comfort and high impact protection. Currently used in some of the best performing helmets and protective gear in sports, we saw XRD® Technology as the perfect fit for the Tuff-Cap.