Custom beach flags are a very popular tool for promoting brands, especially at outdoor events, beaches, and festivals. But if you are thinking of buying custom beach flags, one important question could be: How strong are these flags in windy weather? Before talking about details, it is important to know what a custom beach flag consists of. Usually, these flags from INTERFLAG APEIRANTHITIS are made from strong polyester fabric because this material does not tear easily and can withstand different weather conditions well.