Professor Snape , head of Slytherin House is the potions teacher. This mini sock in Slytherin green has beakers, vials and a Bunsen burner on the leg, on the heel is the professor’s book with a cauldon of bubbling goo. 3 beads are used on the heel for the bubbly potion. All proceeds from the sale of this sock go to the Make a Wish Foundation.link text