The warp is made of 80/1 ultrafine cotton, and the weft is woven with processed nylon and polyester yarns. The difference in shrinkage between cotton and synthetic fibers produces a crepe wrinkle effect, and the material is extremely light and thin, with good stretchability and quick-drying properties. The yarn itself has moisture absorbency, so the pants do not become stuffy and can be worn comfortably even in summer. The design of the Umps Pants is a tapered silhouette with room around the waist, with large pockets in easy-to-access locations.