Bonnet Couture pre-tied scarves “Easy on easy Off” require no tying at all, while others simply require tying a simple knot or bow. Pre-tied head scarves can be a great option for those desiring a quick, easy look without the hassle of a full scarf that must be tied by hand. These convenient head coverings make ideal is chemo scarves due to how easy they are. They can be slipped on quickly and come in a variety of styles, colors and patterns..