Using your new 3D Firefly Starlight Men's Hoodie is a breeze! Just put it on and enjoy its comfort for your daily activities. When it comes to sizing, remember to order 1 - 2 sizes bigger than your normal size to ensure a better fit as our sizing is a bit smaller compared to the USA standard. For washing, you can simply toss it in the washing machine in cold water on a gentle cycle with mild detergent. After that, hang it up to dry, and it'll be ready for your next wear. Keep in mind that the color might look a little different on your screen than in person due to monitor settings, and there could be a 2cm/1 inch difference in size because of hand measurement. This hoodie's integrated printing is super durable, so you don't have to worry about it fading, cracking, peeling, or flaking over time.