Boston Red Sox 47 Snapback - Caster - Silver. The Caster '47 CAPTAIN has a structured crown, flat visor, and an adjustable snapback with raised embroidery on the front and flat embroidery on the side. Made from Wool Blend material.Made from 85/15 wool blend. Our snapback cap features an oversized heat sealed Silver B logo front graphic, bright crisp look and plastic snap back enclosure.