When you think about it, those guys are going to be serious about the quality of their bath linens. Check out this video; it is an excellent aid to visualizing the construction of a towel. There are two main parts to your towel, the base weave and the pile. The pile refers to the loops of the towel. The label on some towels may refer to 100% cotton pile or loops, if this is indicated, assume that the base weave contains polyester. In the video above loops are only created on one side of the fabric, in a towel the loops are on both sides.