Are you fish whistle friendly? Ever wonder if you're among Fish Whistle Friendly people? Put an end to the mystery once and for all with the Universal Symbol for fish whistle friendliness. Inspired by the classic Patagonia logo, this slap is 5" wide on premium weatherproof vinyl. Red, Green, Black and Gold, for the Rasta in all of us. Slap one on your boat, car or fly box, blow the fish whistle and embark on your next journey down the cosmic stream.