Some sneakers transcend their initial purpose of sports performance to become a cultural phenomenon. The Nike Air Max Plus, launched in 1998, is one such shoe. These sneakers defined the era in which they debuted, and those that followed. They have been on sale around the world for nearly two decades without a break and have come in hundreds of colorways and varied color combinations, including leather editions, style changes and laceless designs. In some territories they are better known by the letters "TN" representing the Tuned Air unit they debuted. Now, they are called that everywhere.