HIGH QUALITY MATERIAL: Our women's athletic crew socks are made of 90% polyester and 10% spandex. The premium spandex yarn and cushioned polyester that absorbs sweat to keep feet comfortable and provide much-needed breathability during your hiking, running or other outdoor sports. ARCH SUPPORT: The right amount of arch compression will keep your arch secure and stability for a perfect fit. Elastic cuff tightly locks the heel, to prevent sport crew socks sliding down from your daily work. FULL CUSHION SOLE: The cushion sole covers the entire bottom of the socks, get the ultimate combination of softness and strength in the running crew socks. Max cushioning place in areas of high impact to reduce sock and foot pain during sports or daily activity. REINFORCED HEELS&TOES: Reinforcement in heel and toe provide durability in high stress areas to dramatically improve product life. These socks will last as long as your work shoes or boots SIZE&WASHING TIP: Sock size 9-11/Shoe size 6-11. 6 pairs per pack. Machine wash cold&hand wash cold(suggest using wash bag). Hang to dry. Don’t iron. Don’t bleach. It will retain its good elasticity and softness even after being washed several times.