An ergonomic bandana for cold days. The Team Tube Bandana by Hä? comes with a blend of acrylic, cotton and an innovative new material called Polycolon.Polycolon is super light, transports moisture away from your face and dries very quickly. The Neckwarmer has an ergonomic cut and adapts well to your face. You can also wear it on both sides, which makes it versatile.