What is the ruling on buying "Fitra" shirts, which are not widely sold in my country? Are they considered a thawb shuhra (garment of fame/ostentation)?

It was previously explained that a garment of fame is any clothing that draws people's attention to its wearer and leads him to vanity, hypocrisy, and arrogance, and that emulating the Sunnah is not a form of fame. A ruling regarding "fitra shirts" cannot be issued due to not knowing the common custom in the questioner's country, but the default rule for clothing is permissibility unless there is a Shariah prohibition. If these shirts violate the common custom and are considered a form of showing off or lead to vanity and hypocrisy, then they should not be worn as they fall under the category of fame; otherwise, there is no harm in them.