Many of our adjustable hats have a snapback (Rich 112) buckle (AH30) in the back for the adjustment. They are generally the USA-300, Richardson or Flex Fit Hats. Our hats are either adjustbale or flex fit, depending on which one you choose.
The Richardson 112 or the Outdoor Cap OC771 are the Adjustable hat and is a "Mesh Back" Snapback Adjustable Hat. The hats are identical, just with a different brand new. The "Breathable" Mesh back hats have the USA Flag on the back also.
The USA-300 hat are the hats with the flag on the corner of the brim: