In Japan, carp streamers are traditionally flown on May 5, Boys’ Day. Flying carps (Koinobori) are hoisted onto poles that reach up into the blue sky for several weeks around May 5, and also decorated all year around. The flying carp symbolizes courage and ambition recognizing a tale of a carps that once swam all the way to heaven to become a dragon. This Japanese carp windsock is 100% nylon for longer use outdoors.