This black geometric embroidery casual shirt is super easy to use. Just put it on like any other shirt and you're ready to go for a casual hang - out. When it comes to washing, it's made of polyester, so you can machine - wash it on a gentle cycle. Use mild detergent to keep the colors vibrant and the fabric in good condition. Don't use bleach as it may damage the embroidery. As for sizing, always double - check the size chart because different suppliers have different sizing standards. That way, you'll get a shirt that fits you perfectly.