I don’t know how we missed this. Japanese Astronaut Koichi Wakata is testing a new style of space-aged odor eating underwear during his stay on the ISS. The current garment must be changed every three days but the test item is designed to last a whopping seven days. Additionally, the wicking garment has FR properties.
So, they prevent stink for up to seven days, wick sweat, AND are FR? Sounds like heaven.