What's the difference between athletic leggings and regular leggings? Athletic leggings are different from everyday leggings for several reasons. Firstly, they are made from materials with more stretch, breathability and moisture wicking properties. Athletic leggings may also have more features such as secure pockets and mesh panels to keep you cool. Should I size up or down in workout leggings? Because fitness leggings are made with materials that are designed to stretch and offer free range of movement, you should opt for your usual size without needing to size up or down.