Purdue Boilermakers logo set of 3 graphite headcovers is constructed of durable nylon and contains different sizes to ensure a proper fit on your clubs. The #1 is designed to fit up to a 460cc driver. The new expandable two-color full-length sock provides maximum protection. The three embroidered Washington State Cougars trademark logos add a unique style to the headcover. Embroidered numbering system 1, 3, X.