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. High density cushioning provides cushioned comfort without the bulk. The Perfect ToeA(R). (No irritating toe seam.) No Show Tab height sits below the ankle for maximum versatility. 91% Nylon; 9% Spandex. Machine wash cold. Tumble dry. No bleach or fabric softeners. For best results, wash socks inside out.