They are everything you need – comfortable, durable, washable The quality is unsurpassed Each cap is made in the good old USA by skilled union craftsmen and inspected before it leaves their factory All twentyseven versions are available in sizes from 6 7/8 through 77/8. Hat Size European Size 21 1/8 6 3/4 S 54 21 1/2 6 7/8 S 55 21 7/8 7 M 56 22 1/4 7 1/8 M 57 22 5/8 7 1/4 L 58 23 7 3/8 L 59 23 1/2 7 1/2 XL 60 23 7/8 7 5/8. Description Authentic Airman Battle Uniform utility cap made of 50% nylon / 50% cotton quarpeltreated twill fabric Features four vents on the sides of the cap This cap is NIRcompliant is approved for use in the operational theater Quarpeltreated 50/50.