It is one piece of clothing that makes you feel like the hero we need today. It is sure to move your performance up a level. What's better than a pair of superhero inspired leggings? How about a pair of superhero inspired leggings that can keep you warm while you exercise in the wintertime! These One Punch Man Leggings are made with Alpaca Fiber, which has been proven to be the warmest natural fiber in the world.