BZ Award - Flag Backs
IB Designs USA decorative nautical signal flags are not the same thing as commercial flags. We make ours using quality cotton and muslin, visible from the front only. Each flag has a white linen backing, as shown here.
We print the letter of each flag on the back, as you can see, so that you'll always know the pattern translation into English.
These flags are meant as decorations, and are not waterproof for everyday use on a boat. You can certainly hang them in a cabin, or hang them outside. Just treat them as you would a fine dress shirt.