What does Closure mean?
The type of closure that your hat or cap uses determines if and how its opening can be adjusted to your head size. Typically, when a closure is adjustable, the hat will show the mention OSFA (One Size Fits All).
Since not all closures are adjustable, it’s important to pay a close attention to this characteristic to ensure your cap fits comfortably on your head.
There are six main closure types:
