Crease is a term used in the sneaker community to describe wrinkles or lines that appear on the toe box of a sneaker, typically on the Nike Air Jordan 1 model. These wrinkles are caused by wearing the sneaker and are considered a natural part of the aging process of the shoe. They can also be caused by improper storage or care of the shoe. Creases are often considered a sign of wear and can affect the overall appearance and value of the sneaker. Some sneaker enthusiasts may prefer shoes with minimal creasing, while others may not mind it as much.