This long sleeve t-shirt is super easy to use. Just put it on and enjoy the comfort. For washing, turn it inside out and use cold water with a gentle detergent. This helps keep the colors vibrant and the fabric soft. Avoid using bleach as it can damage the cotton. Hang it to dry or tumble dry on low to prevent shrinking. You can wear it on its own in mild weather or layer it under a jacket when it's colder. With proper care, this t-shirt will be your go-to for a long time.