... such as AZO-free material, T/C, polyester, acrylic, canvas, denim, camouflage, washed wrinkle fabric, microfiber, etc).2.Size ... 4.Logo: embroidery, print, or applique etc. ( Thermal transfer printing, screen printing, ordinary embroidery, 3D embroidery, etc. 5.Back closure: velcro ... caps, finsherman caps,visor caps, military caps, fashion caps,led hats, fiber optic hats, lady hats, baby hats, fashion ...