If you are a thin girl, it is recommended not to choose an I-shaped vest. Because the skeleton is small and thin, the I-shaped vest will expose your delicate figure and look skinny. If you are a fat woman, you'd better choose carefully in the middle of the night. Obviously, I-shaped vests can expose your fat. If you like I-shaped vests, it's perfect for girls who are not confident about their bodies to wear thin tops. Boys: Generally, boys don't pay as much attention to figure as girls, so I-shaped vests can be said to be suitable for all boys. Just buy the right size according to your own figure.