NCAA Purdue Boilermakers Go Hat, White 100% Eventure Polyester Fabric Imported Adjustable rear buckle with ponytail portal Eight panel baseball/running cap delivers a great fit with maximum comfort Eventure Knit fabric shell and Eventure terry-wrapped headband for maximum air flow and moisture transfer Dries 3 to 4 times faster than cotton Officially licensed NCAA cap by Top of the World Adjustable rear buckle with ponytail portal