Great sun blocking hat. Has a pocket in the interior crown. The large fits 22 1/2” to 24” crown. PRODUCT SPECS 2½" folding Clamshell Brim™ UPF 50+ Certified Sun Rating (mesh vents not rated) Strategic Mesh Ventilation Water Repellent/Stain Resistant Wicking Sweatband Interior Crown Pocket Cordlock and bungee for adjusting size Designed in USA/Imported