This men's Harajuku track jacket is super easy to use. Just zip it up and you're ready to go for any outdoor exercise or casual outing during spring, autumn, or winter. When it comes to sizing, always check the size chart as each item may vary. If it's an Asian size, it's a good idea to choose a larger size. For maintenance, you can machine - wash it on a gentle cycle with cold water. Avoid using bleach as it may damage the colors and fabric. Hang it to dry to keep its shape. And that's it! With proper care, this jacket will serve you well for a long time.