Northwestern University Wildcats - 4x4 Die Cut Decal is officially licensed and made of outdoor vinyl material with permanent adhesive. The die cut decal is cut to the outside image of the logo shown and measures 4x4 inches. Decal is printed with a 3 year outdoor rating. The decal is supplied with a clear liner and clear transfer tape, and application instructions. The official die cut logo decal is ideal for windows or windshields.