Two major things make a windsock, its material and its construction. Premium nylon fabric that is made right here in the USA. Nylon offers unparalleled windsock durability to the elements and will not become rigid in cold weather, These windsocks are extremely responsive in even the slightest of wind. From there it gets urethane coated and UV protected, giving the windsock superior fade resistance and color retention. The material is subjected to a variety of tests by an independent lab to verify its structural integrity and UV resistance. It's reinforced with double stitched hems and heavy duty brass grommets, assures these windsocks long life reliability.