Silk is a natural wicking fabric that will keep you cool and warm. WILD RAGS (silk scarves) Silk wild rags are a symbol of the Old West. Worn by cowboys in a by-gone-era, they now serve a similar purpose of not only acting as an insulator, but also wicking away moisture to keep you dry. Silk is a natural fiber, warmer than wool, and its rich feel and look is a wonderful accessory, whether you are a cowboy or a corporate executive.