686 M-Pro Metallica Unstructured Hat The 686 M-Pro Metallica Unstructured Hat brings Metallica style to an easygoing everyday cap. Its unstructured, mid-profile design keeps the fit comfortable and casual without feeling overly rigid. Built to work across a wide range of head sizes, it&';s a versatile option for everyday wear. Details Fit: Unstructured, mid-profile fit Sizing: Versatile design made to accommodate a wide range of head sizes Collab: 686 x Metallica