Slide Buckle Closure - One Size Fits Most Jack Daniels & No. 7 Logo 6-Panel Structured Cap Cotton/Twill Blend Black Mystery surrounds just what the "7" of the Old No. 7 means, but there's no question that the Jack Daniel's Tried and True ball cap looks great with its round logo screen printed on the side. This cap is a real classic. It also has the Jack Daniel's logo on the front panel. The back adjusts with a cloth strap with sliding buckle closure. The hat's under brim is a contrasting white.