Nike Sphere Dry technology for maximum moisture control and quick drying This cap has an unstructured, low profile design with a hook and loop closure A contrasting Swoosh design trademark is embroidered on the bill and center back 100% polyester 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 design trademark is embroidered on the bill and center back. Made of 100% polyester.