These hats have a thick PVC OZ Machine Company Logo patch on the front with raised white letters. They're custom made by "Branded Bills".
Branded Bills' Product Description:
"QUALITY THAT DOESN'T QUIT
Our flat truckers have front panel materials that are colorfast and easy to clean with a flat brim and durable mesh backing.
FIT & FABRIC
High crown with a flat brim.
Size: OSFM
80% Acrylic, 20% Wool, with 100% Mesh Backing
Hand-wash only."