To use this parka, simply zip it up and adjust the hood if it has one for extra protection from the cold. When it comes to sizing, always check the size chart carefully as different suppliers may have variations. This parka is made of polyester, so it's relatively easy to maintain. You can machine - wash it on a gentle cycle with cold water. Use a mild detergent and avoid using bleach. After washing, tumble dry on low heat or hang it to dry. Keep it away from sharp objects to prevent snags on the shiny metallic surface. Store it in a cool, dry place when not in use to keep it in good condition.