The Cubs Win Flag is a victory flag that is flown at Wrigley Field after every Chicago Cubs home win. The flag is variously referred to by approximately a dozen names, combining; either Cubs or Chicago Cubs; Win, W, White, White W, or W Win; and flag, banner or banner flag. Other common names for the symbol include Chicago Cubs W Win Flag and Chicago Cubs Win Banner Flag. Flying a flag over Wrigley field to denote wins and losses is a longstanding tradition. Currently, the Win Flag is composed of a large blue letter "W" on a white background while the Loss Flag is a large white letter "L" on a blue background. The phrase "White flag time at Wrigley!" is therefore used to explain that the Cubs have just won that day's home game. The flag is raised by a scoreboard crew member immediately after the completion of a game, and in the case of a doubleheader split, both flags are flown. It is customary to fly flags from sunrise until sunset, unless they are directly illuminated. At the beginning of each day, the cross-shaped "masthead" atop the center field scoreboard displays the American flag at the top, and three strands of flags bearing the team colors and city names of each of the National League clubs, one strand per Division in order of that day's standings. Immediately after the game, one of the strands of flags is lowered, and either the W or the L-lettered flag is raised in its place. The W-lettered flag is raised on the left field side of the board, above the blue light that also indicates a win. The L-lettered flag is raised on the right field side of the board, above the white light that indicates a loss. Once the Win or Loss Flag has been raised, the other flags are lowered and also stowed away inside the scoreboard. Our 3'x5' Major League Baseball flags are constructed from a long lasting polyester knit material and have a standard D-ring. Weather resistant for outdoor or indoor use. Exact design is subject to change.