*L'eggs conducted 12 week consumer and clinical trials: participants wore product 5 days a week. Initial results may be noticed after just 4 weeks of use. Lasting effects require continued use of this product. Microbeads that produce this effect remain effective through 5 hand washings. Even after beads are no longer effective you still have a great pair of control top pantyhose! Made in USA and imported. Slightly Imperfect. Quantity reflects number of 4-pair packs.