This is a medium weight, pre-cut, tearaway backing that is made to fit all HoopTech Cap Frames.
The 3.75″x11″ is used mainly for our Gen 2 Cap Frame to be used with structured and unstructured hats as well as visors.
The 4.5″x11″ is used mainly for our Bucket Cap Frame, Back of Cap Clamps, and to be used with the Gen 2 when embroidering on bucket hats.