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Humans evolved to sweat, it allows us to perform strenuous activity during the heat of the day. Massive evolutionary advantage over the vast majority of animals that will die of heat stroke while humans are just warming up.
I wear 100% cotton BDU pants literally every day. They are more appropriate for the climate. The military prefers poly because it wears better and doesn't wrinkle. But for comfort working in a dry climate, cotton can't be beat.
In winter I will go down to a tshirt if I'm doing anything super physical.
Really no point in debating with people that think materials that block evaporative heat transfer are better in hot and dry climates and think that clothes that retain moisture are better in cold climates. Never mind that every Olympian winter and summer are wearing kits made of poly, that the military wears poly, and every manufacturer of athletic clothing uses mostly poly or wool materials.When you get sweaty, cotton lets the sweat sit directly on your skin. Even if it's the only layer you're wearing it takes a LOT longer to dry than poly or wool AND cotton loses nearly 100% of its ability to "insulate" when wet. (poly retains approx 60% of it's insulation and wool retains over 80% when wet)
Even if your outer layers are synthetic and retain insulation this will at the very least result in feeling "clammy" and uncomfortable.... and when you get to serious cold it will speed chills/hypothermia.
None of the above is "opinion"..... these facts are why people say "cotton kills" again and again.
But never let it be said I'm not open-minded... anyone with CREDIBLE evidence to prove what I posted incorrect I REQUEST that you post it.
Also this:
as long as you aren't regularly sweating, cotton is fine. I wear loose fitting cotton pants on some hot ass days, if I know I'm not doing any activities where I will be sweating
All of my karate gis are cotton. Even my lightest 10oz Mugen orange labels are fairly soaked before a training session is over. I would say my BJJ gis are better, but since you spend so much time with other people glued to you, they really aren't. At least with the BJJ ones, you spend a lot of the time on the mats, with the top being wide open outside of your belt. That helps a little.
Main reason I stopped buying 100% cotton dress shirts was having to iron them. 50-50 is almost wrinkle free right out of the dryer. They also wear a lot longer. I suppose they are "cooler," meaning you don't feel as put out in warmer weather, but I don't think I was super cognizant of it, it was just something I sensed without conceptualizing it. I suppose this applied to pants, too. Recently I've been partial to 50-50 T shirts over cotton.
Yeah, for my causal clothes I pretty much only wear cotton. Except my nylon shorts in the summer. I rarely wear true business clothes, but I do think most of those are a blend.
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