Don these Slytherin Green/Black Knee High Socks to show where your allegiance lies in the wizarding world of Harry Potter. These socks feature a snake silhouette atop a green and black background. Every member of Slytherin needs at least one pair! Made of 68% acrylic, 30% polyester, 2% spandex. Machine wash cold with like colors, do not bleach, tumble dry low.