To use these sports fitness trousers, simply put them on like regular pants before your workout. They're great for running, gym sessions, or any other sports. When washing, use cold water and mild detergent. Hang them to dry to keep their shape. Avoid using bleach as it may damage the fabric. If there are any stains, spot - clean them gently. Also, don't iron at high temperatures as it can affect the elasticity of the trousers.