A 30-year-old male wearing this short-sleeved shirt was lifting dumbbells at the gym. The grey quick-drying short-sleeved shirt was tightly against his back, and obvious wrinkles appeared as he exerted force. When raising the hand, the collar of the short-sleeved shirt slides down slightly, revealing a bit of the collarbone. After the event, I wiped the sweat. My palm rubbed against the chest of the short-sleeved shirt, leaving a little reflection of the sweat stain. During the process, the proportion of the short-sleeved pattern remains unchanged