This is a medium profile cap with an unstructured crown. Unstructured crowns mold to the owner's head over time moreso than the structured crowns, which are designed to maintain the factory shape. The adjustable strap in the rear of the cap is secured by a smooth touch plastic hook and loop system. Set up fees are waived for this style -- a $100 value! You may mix and match the cap colors of this style in your order, but remember, each color has a minimum of 48 caps per color.