What does Adjustable mean?

The term adjustable refers to the closure type. It’s a term used to describe all the hats and caps that offer a way to change the circumference of their opening. Usually, an adjustable cap will have the mention “OSFA” which stands for One Size Fits All. This is because the wide range of head size supported by adjustable caps accommodates almost any type of person.

An adjustable cap can use different types of closure that can be made from plastic or fabric. The most common types of closure are the snapback, strapback, clipback, stretch, fitted and the trusty velcro.