Flag Materials Guide: Nylon, Polyester, CiCLO, and Cotton Compared
Flags are made from three main materials: nylon, polyester*, and cotton. Each has a different feel, different durability, and a different best use. The right choice comes down to where you're flying, how often, and what happens to the flag when it's worn out.
*We are moving everything to CiCLO polyester which deserves it's own discussion because of how amazing and revolutionary it is.
Materials at a glance
| Nylon | Polyester | CiCLO Polyester | Cotton | |
|---|---|---|---|---|
| Weight | Light (~2 oz/yd²) | Heavier (~2.5–3 oz/yd²) | Heavier (~2.5–3 oz/yd²) | Heavy; varies by weave |
| Best wind range | Light to moderate (5–15 mph) | Light to heavy (10+ mph) | Light to heavy (10+ mph) | Not suited for extended outdoor flying |
| Color vibrancy | Shiny finish | Slightly more matte, rich color | Slightly more matte, rich color | Rich, deep colors; beautiful drape |
| Outdoor durability | Good; wears faster in heavy wind | Strongest; holds up in tough conditions | Strongest; holds up in tough conditions | Poor; not recommended outdoors |
| Drying time | Medium | Fast | Fast | Slow; absorbs moisture |
| End of life | Persists in landfill | Persists in landfill | Biodegrades in landfill conditions | Naturally biodegradable |
| Best for | Residential poles, occasional use | Permanent outdoor, coastal, commercial | Same as polyester, with better end-of-life | Indoor display, framing, ceremonial use |
Nylon
Nylon is lightweight, takes dye well, and produces the bright, almost luminous colors. Because it's light, it catches the breeze easily and flies well even on calm days.
The tradeoff is durability. In sustained winds or coastal conditions, nylon flags wear faster than polyester. The fabric has more elasticity, which helps it move, but that same flexibility can lead to fraying along the fly end with heavy, repeated stress. For a flag you fly a few days a week in typical residential conditions, could be a good call. For a flag on a 35-foot commercial pole that never comes down, polyester will outlast it.
At Flags For Good, we never use Nylon because polyester does the same or better in almost every use case.
Polyester
Polyester flags are built for continuous outdoor use. The heavier weave holds up in sustained winds, and polyester is more resistant to UV fading than nylon over time. Colors stay truer after months in direct sun, especially if you follow the tips in our flag care guide.
CiCLO polyester
CiCLO polyester performs the same as standard polyester in every way that matters while you're flying it. Same weight, same wind performance, same durability. The difference is what happens when the flag is done.
Standard synthetic flags are essentially permanent once they end up in a landfill. Synthetic fibers don't break down in any meaningful timeframe. CiCLO changes that. It's an additive built into the fiber during manufacturing, not a coating applied afterward. In a landfill environment, where microorganisms are naturally present, CiCLO-treated fibers break down significantly faster than conventional synthetics.
For a product category where retirement is part of the normal lifecycle, that matters. Flags wear out. They're supposed to be replaced when they do. CiCLO means that replacement doesn't carry the same environmental cost as a standard synthetic flag. It's the same flag, with a better ending.
Since early 2026, Flags For Good is proudly moving production of all of it's flags to CiCLO polyester!
Cotton
Cotton flags have a look and feel that synthetics can't replicate. The colors are rich and deep, the drape is natural and full, and there's a weight to them that feels traditional in the best sense. If you've ever seen a well-made cotton flag hanging in a government building or displayed in a shadow box, you know the difference.
The tradeoff is outdoor durability. Cotton absorbs moisture, fades faster in UV, and breaks down under the stress of sustained wind much quicker than nylon or polyester. Cotton flags are best kept indoors, used for ceremonial display, or framed. They're not the right choice for a flagpole that's exposed to the elements year-round.
On the upside: cotton is naturally biodegradable and can be retired by burning, which is the Flag Code's preferred method for worn flags. That's not an option with synthetics.
Best fabrics for use cases:
- Residential pole, typical conditions: CiCLO polyester
- Permanent outdoor or coastal installation: CiCLO polyester
- High-wind area (consistently over 15 mph): CiCLO polyester
- Indoor or ceremonial display: cotton
- Care about what happens to the flag after it's retired: CiCLO polyester or cotton
Not sure what size flag you need for your pole? See our flagpole size guide.
