To wear this t-shirt, simply put it on like you would any other shirt. The stretchy material makes it easy to slip on and take off. As for care, it's best to machine wash it in cold water on a gentle cycle. Avoid using bleach as it can damage the fabric. After washing, tumble dry on low to keep the velour soft. When it comes to sizing, always refer to the size chart provided. Different suppliers and brands may have variations, so double - check to ensure a proper fit. Don't forget that if you're used to US sizes, you may need to adjust for Asian sizes as mentioned. And enjoy your stylish and comfortable velour t - shirt!