Honestly, it always amazed me how in Ukrainian society, we spread awareness about occupation of Ichkeriya, Sakartvelo, Crimea, even indigenous Siberian people - but when it comes to Belarus, our Baltic neighbour who was literally shot dead and russified not so long ago, who also had heavy repressions and artificial famines by russians - in fact, it still is repressed by russia through Lukashenko's regime and victims of repressions are MY PEERS EVEN - then suddenly Belarus is "Slavic russia's sister". And it was like this even before 2022 russian invasion of Ukraine. I really don't get it. The similarities between Belaruthian culture/language and Lithuanian are, in fact, so noticeable, that russia tried MULTIPLE TIMES to sew them together and label LITHUANIA "Slavic russia's sister", TOO. AND LITHUANIA IS NOT SLAVIC AT ALL, IT IS BALTIC. BALTIC. ALWAYS HAS BEEN. WHY THE HELL BELARUS IS SLAVIC, THEN. That's also why Lithuanians nowadays really don't want to have connections with Belarus - they don’t want to fall under russian occupation again.
People believe that if we sacrifice Belarus to russia then we will be safe?? It didn't prevent russia's invasion of Ukraine. The first step of decolonizing russia, the first step of returning back our safety is accepting the fact that Belarus is not "Slavic russia's sister".
Some of these costumes are Lithuanian, some are Belaruthian.