The Chill-Its 6615 High-Performance Bandana Do Rag is made with Hi Cool moisture-wicking technology to keep workers comfortably cool and dry on hot days. The Hi Cool performance fabric wicks moisture for quick-drying, while the absorbent terry cloth sweatband prevents sweat from dripping into eyes. This low-profile cooling do rag can be worn alone or under a hard hat. One size fits most, the back features an elastic band that stretches to comfortably fit a variety of head sizes. To be worn correctly, the three pieces of fabric should also be tied in a knot. Machine wash as needed and hang to dry. Ideal for construction, landscaping, roofing or anyone working in the heat. It is also a great bandana headband for running, hiking and other recreational activities.