The Warp and Weft refers to the essential “building block” threads used to create any fabric. Warp threads run vertically i.e tightly stretched along the length of the fabric while the weft threads run horizontally and are woven between the warp threads to create various patterns. “End” is a single warp thread whereas “pick” is a single weft thread. A fabric will often use different thread counts in the warp and weft directions in order to get the desired effect. Warp threads tend to be stronger and coarser, because they must be able to withstand tight stretching.