If you find your workout leggings falling down while performing your favorite exercises, it could be due to wrong fit and/or material. Some fabrics are more likely to slip on your skin—these include spandex, Lycra, and nylon. However, you're more likely to find compression leggings made with these materials. Cotton may not feature the same level of compression as these materials, but it won't slip on your skin as easily. Fit is another key factor that may cause slipping. Finding a pair with a compressive elastic waistband is likely to prevent major slipping. But if your leggings continue to fall down even with non-slip characteristics, they may be the wrong size. It's important to look at size charts provided by the brand as this will help you decide what size is best for your body type.