|Flags are used for many different purposes by many different people. Some flags are used for outdoor display, others for memorial purposes, and still others for indoor display. Depending on its use a flag can be made out of nylon, cotton, a polycotton blend, polyester, or a special kind of "spun" polyester. Common uses for these flags might be:
Nylon - the most durable and serviceable option. Nylon is duarable, retains color well, flies in a breeze well, and is easily cleaned.
Cotton - a traditional and, to many, the most beautiful material. It has a natural feel and a pleasant "heft." However, like anything made of cotton, it is less durable and should therefore be used for decorative or ceremonial purposes.
Polycotton blend or polyester - these materials print very well and are attractive. Their best feature is economy, making them excellent for temporary use or where cost is an issue.
"Spun" polyester - a special, premium material that holds up well in windy or harsh conditions. Because it is spun, it has the feel of cotton, but its synthetic nature gives it the durability of nylon.
Remember to always treat a flag with common sense and respect, never fold it wet, regardless of material, and replace whenever it reaches a condition not befitting the symbol of the country. A good rule is if you wouldn't wear it, don't fly it.