Our premium 4ft x 6ft Nylon Netherlands Outdoor Flags are made of all-weather Nylon with grommets. These Outdoor Flags are the best commercial high-wind flags in the industry. Our premium 4ft x 6ft Nylon Netherlands Outdoor Flags are the best commercial high-wind flags in the industry. They are made from a heavyweight nylon that has a special treatment that will reduce sun and chemical deterioration and are finished with strong canvas headings and large brass grommets.