Carhartt Mens Rugged Professional Series Canvas Mesh-Back Cap. This cap features a 59% cotton/39% polyester/2% spandex canvas with a 100% polyester mesh back. The Carhartt Force sweatband fights odors and FastDry technology wicks away sweat for comfort. It is a structured, medium-profile cap with a pre-curved visor and an adjustable fit with a plastic closure. Carhartt label is sewn on the side.