Commemorate the Astros beginnings as the Colt .45s with the '47 Houston Astros Cleanup Cap. Made of garment-washed cotton twill for a worn look, this cap features a raised ".45s" embroidered on the front to show everyone you're a long-time fan. Relaxed fit. Self-fabric strap. Score more cool fan gear at Academy. com. '47 Houston Astros Cleanup Cap Navy Blue - MLB Caps at Academy Sports