What makes our aviation windsocks different? Two major things make a windsock, its material and its construction. We start off with a premium nylon fabric. Nylon offers unparalleled windsock durability to the elements and will not become rigid in cold weather, keeping our windsocks 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.