Using your personalized sleeping pet sleepshirt is easy - just slip it on and enjoy the comfort! When it comes to maintenance, you can safely machine - wash it, which makes keeping it clean a breeze. As for the color difference, don't be surprised if the actual sweatshirt looks a bit different from the preview image. This is normal because of the lighting during the product photoshoot or your monitor settings. And remember, since it has copyright artwork, respect the intellectual property rights. Just wear it, wash it as needed, and have a great time with your unique sweatshirt.