The closure is the back piece of a hat that determines its fit and adjustability. It enables you to find the perfect fit for your head size by changing the size of the hat. The closure helps the cap to hold onto your head without getting blown off by the wind or falling off your head as you exercise. It also makes an impact on your style when you wear the hat. If you’re buying wholesale hats, the type of closure is something that needs to be thought of along with the hat style, fabric, color, and other factors. This guide compares the most common cap closures to help you find one that fits your bill.