This is a Castelbajac short-sleeved shirt that I purchased at Takashimaya in Osaka and was wearing. There is some soiling and wear from normal use, but no major damage, and I think it's still wearable, so I'm putting it up for sale. The size is indicated as 50. It's a collaboration with POPEYE. The material is 94% polyester and 6% polyurethane.