The eco-friendly BUFF Original Lightweight Merino Wool Multifunctional Neckwear - Mustard delivers true four-season comfort and protection. It's a soft, warm, wind-resistant, and lightweight layer made with 100 percent Merino wool. Wearable in over ten different ways, it's versatile multisport headwear delivering every-season performance with natural moisture wicking and odor control properties. BUFF® Merino wool is sourced from humanely raised, non-mulesed sheep.