There are several key factors to consider when selecting workout clothing. Comfort is a big factor. You don't want to choose clothing that is uncomfortable. The way the clothing fits is also important. Workout clothing tends to be smaller so it's important to choose clothing that allows for a wide range of motion. Wicking, which is the ability of fabric to help remove sweat from the body, is better than plain cotton. Layering is another factor to consider because you want to have clothing that can be easily layered in the colder months. You should also consider whether or not the clothing is technologically advanced and whether or not it is activity appropriate.