65% Polyester, 35% Cotton Made in USA and Imported Snap closure Hand Wash Only Black NASA Letter on 6 Panel Low Profile Mesh Back Trucker Cotton Blend Twill Hat Caps for men and women. 3D looking PU material graphic design printed on trucker caps. Plastic Snap Closure. Size: OSFM - Adult (58cm/22.8"). Front: 65% Polyester 35% Cotton Back: 100% Polyester Mesh. Structured. Firm Front Panel.