cap Made of 100% polyester cool mesh fiber ONE SIZE fits most with elastic band Keeps ... mesh fiber.ONE SIZE fits most with elastic band, fitting up to XL.Keeps tight and comfort.Thin, soft, flexible ... and smooth material. More details for your reference: 1.Material: cotton twill,AZD-Free material,canvas,polyester,acylic,mesh,bamboo ... the world to contact with us. Jenny Cool Mesh skull cap