Our PF Relief product is designed to provide intense compression in specific areas of the foot in order to relieve foot pain. Please be advised that this sock is designed to fit snugly. If you are in between sizes, please size up in this product. Product Details Eases heel and arch pain. Targeted Compression lifts, stretches, and stabilizes the plantar fascia and supports the Achilles tendon. Easy-to-wear socks provide convenient relief. Our thinnest cushion option provides a lighter, cooler feel. The Perfect ToeA(R). (No irritating toe seam.) 2" quarter style provides additional support along the Achilles. 92% Nylon 8% Spandex. Machine wash cold. Tumble dry. No bleach or fabric softeners. For best results, wash socks inside out.