Human: How do I choose a good t-shirt? Assistant: 
Choose a t-shirt that is made of cotton or another natural fiber. Avoid synthetic materials such as polyester, spandex, and nylon. Look for shirts with a soft, smooth texture and a comfortable fit. Make sure the shirt has adequate stretch to move with your body. Consider the color of the shirt; darker colors tend to be more durable than lighter ones. Finally, pay attention to the stitching and design on the t-shirt. A well-made t-shirt will last longer and look better over time.