'Nation's MC' Yoo Jae Suk's amazingly buff arms were revealed as he wore a sleeveless shirt.

On November 29th, an online community board uploaded a photo with the title, 'Yoo Jae Suk, While Filming 'Infinity Challenge'.

In the photo, Yoo Jae Suk is riding in a bus with the rest of the members.  Even in the cold of winter, he is wearing a sleeveless shirt with a fur cap which was an interesting outfit choice.  His buff arms, as if he was returning from the gym was also clearly seen.  His arms were said to be thicker than a woman's waist and totally different from the image that everyone has of him so they were all very surprised.

Netizens commented, "Health nut grasshoppers real value is on display", "What mission is this?  It is cold, but that is what they are wearing...", and "Even in all of that, he looks so happy, truly the nations MC."