My personal favourite over the years has got to be the Brazil national team.
But for this poll I’d have to go for Barcelona - iconic kit AND the last major European team to get a sponsor , I believe they managed to hold out until 2010/2011 ? before getting a sponsor ! Before that they had UNICEF for free for a couple of years - a class act and kudos to them .
Barcelona's football jersey is very iconic, the red and blue color really represents their logo exactly. If you see the red and blue in vertical stripes, the first thing that will come in to your mind is the Barcelona, even in any sports that I've watched, I see Barcelona as red and blue. The second to my favorite football jersey is from Mexico because of its aesthetic color combination, the mossy green, white and red makes it more iconic and is very eye-catching to the audience. I remember that my uncle once had this and he put it into auction and sell it to a certain amount of money which is big enough for a vintage football jersey. Hoping that they use vintage and iconic football jersey again in the next FIFA after this Covid-19 pandemic.