To use these leggings, simply pull them on over your legs. They're great for various activities like sports or casual outings. When it comes to care, machine wash them in cold water with like colors. Avoid using bleach as it can damage the fabric. Hang them to dry instead of using a dryer to keep the elasticity and shape. Check the waistband and seams regularly for any signs of wear. With proper care, these leggings will serve you well for a long time.