When choosing workout clothing, it's important to pick pieces that are comfortable, breathable, and allow for a full range of motion. For tops, look for lightweight, sweat-wicking fabrics like polyester, spandex, or nylon. For bottoms, look for shorts or pants with a drawstring or elastic waistband for a comfortable fit. Make sure to choose the right size, too. If you're going to the gym, opt for clothes that are designed for the activity. For example, if you're doing yoga, look for clothing that won't restrict your movement.