To use this outerwear, simply put it on like any other long - sleeve top. The drawstring can be adjusted to your liking for a better fit. The pockets are great for storing small items like keys or a phone. When it comes to maintenance, remember to machine wash it in cold water and tumble dry on low. This will keep the fabric in good condition. As for precautions, avoid using bleach or harsh detergents as they may damage the polyester material. Also, check the size chart before purchasing to ensure you get the right fit.