To use these tights, simply put them on like you would any other pair of tights. They're great for track and field or team sports, offering support for your leg muscles. When it comes to sizing, measure your height and weight as mentioned. If you're in doubt, refer to the size guides. For maintenance, wash them in cold water with like colors. Don't use bleach or fabric softeners as they can damage the fabric. Hang them to dry to keep their shape. Remember, these tights are made to support your active lifestyle, so take good care of them.