A ball cap without an adjuster in the back of the crown is referred to as a fitted cap. Some fitted caps are size-specific based on head circumference while other caps have an adjustable elastic straps stitched into the back of the crown for a universal fit. Most fitted caps are sewn into six panels. On occasion eyelets are added for ventilation. If you are searching for a higher end cap, with a more distinguished appearance, then fitted caps are the right fit for you.