100% Heavyweight SolarGuard Nylon. Features strong duck heading and two large brass grommets. Durable and fast drying. Design is sewn and embroidered. Each Yacht Club Officer's Flag designates the presence of an officer on board. The Flags are standardized, each designed to correspond to a specific position in a club. The hierarchy is based off US Naval signals. The Flags feature various patterns, contain either the Yacht emblem or another that relates to their position.