Adjustable hats have a closure on the back to adjust the size and fit of the hat and have an opening in the fabric above the closure.
Stretch-fit hats do not have a closure to adjust the size, and have closed backs, with no opening. The elastic A-flex sweatband allows for a snug comfortable fit.
Ultra-fit hats combine the features of an adjustable and stretch-fit hat to allow for maximum comfort, creating a perfectly customized and tailored fit, specific to your head.