DuPont Nylon 200 denier fabric for durability. Unlike flags with sewn stars that block out light, Sun-Glo flags glow brightly when the sun shines. All Sun-Glo flags are finished with lock-stitched hems, poly-woven heading and durable brass grommets. UV resistant Solarguard Nylon. Fully dyed stars and strips. Always, Made in the USA!