Be ready for the action in the Nike College Rivalry Snapback Hat. This unique hat uses a adjustable snap back closure and flat bill to create a structured fit that few will be sporting. Embroidery on the front and back represents your program, while the school coloring on the underbill displays a pride only the most worthy Nike teams are privileged to wear! Army/Navy: Dri-FITŪ wool (100% polyester). OSU: 98% acrylic/2% spandex. Imported. One Size Fits Most.