These pants are made of the highest quality raw materials and sewn with care in the United States. The material is 80 20 nylon and spandex. We are fussy about quality. They are designed for active, aerobic activity and long wear. They are 5 panel pants with a gusset bottom for maximum wear and comfort. So whether worn for a short competitive program or a long night of recreation, comfort is not an issue. The extra strength stitching and wide elastic waist band are intended for long, comfortable use. Wash with cold water.