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.