Roving and wool top are often used to spin worsted yarn. Many hand spinners buy their fibre in roving or top form. Top and roving are ropelike in appearance, in that they can be thick and long. While some mills put a slight twist in the rovings they make, it is not enough twist to be a yarn. The fibres in top and rovings all lie parallel to one another along the length, which makes top ideal for spinning worsted yarns.