A raglan sleeve baseball type tee.  The seam lines of the armholes are designed in a gentle S-shape to ensure range of motion without interfering with movement, and other attention to detail is scattered throughout. In fact, the visual effect of "making shoulder width less noticeable" is also a nice point. The colors are full of 90s vintage and street flavor, making this a piece that is somehow retro and somehow new and full of sporty mood.