To use this Astrid costume, first, put on the leggings. Then, slip into the dress. Add the sleevelets to complete the look. When it's time to take it off, carefully remove each piece. As for care, you can gently hand - wash the costume in cold water. Don't use harsh detergents as they might damage the color. Hang it up to dry. Make sure to check the Rubies size chart to pick the right size for your child. And remember, this is a kids' costume, so handle it with care to make it last.