Fabric: Nike Sphere Dry technology ensures maximum moisture control and quick-drying performance. This cap has an unstructured low-profile design with a hook and loop closure. The contrast Swoosh logo is embroidered on the bill and center back. Made of 100% polyester.Please note: Although this cap is noted as M/L on the label and on the ordering grid it is only offered in one size. It is One Size Fits All (OSFA).