cotton sucks!
It gets soaked with sweat and never dries and if it gets wet and it's cool you will freeze because it doesn't insulate at all when it's wet.
It takes forever to dry after you wash it so it wastes a ton of electricity.
It rips so easily I can't usually get more than a day or two out of a cotton shirt without getting holes in it while climbing.
Cotton crops require more pesticides and other chemicals than any other crop.
I have been using polyester and nylon for work clothes for a long time now and find them to be much better than cotton.
They don't get soaked and when you do get them wet they drive very quickly they also are much more durable I have had the same 6 tee shirts now for more years than I remember and still no holes.
most of the good poly stuff I've used is treated with anti odor mine don't smell at all.
They usually will be antimicrobial, anti odor, UV blocking, moisture wicking, fast drying, temperature regulating and super durable.
I mostly use Walls work wear 100% polyester hi-viz tees they are around $10 bucks at Walmart.
I also like Ironclad's dry tees although I think they stopped making them.
Arborwears tech stuff is a poly cotton blend so they won't perform like 100%polyester.
Also avoid the loose weave Tech Wick style shirts as the fibers will pick very easily. the ones that are durable have a tight weave similar to a regular cotton fabric.
while we're on the subject I also highly recommend wool socks and synthetic blend underwear I don't wear any cotton while working and I no longer have to suffer with any sweaty moist areas it's all dry and comfy
One side note if you are doing line clearance you shouldn't wear synthetics my local Electric Company told me they require all lineclearing workers to wear 100 percent natural fibers so that they won't melt to you if you have an incident.
from what I have read and seen I believe if not for the lies and payoffs we would probably have clothes mostly made of hemp apparently the fibers are far superior to anything else natural or synthetic and can be made to be as soft as silk or as stiff as metal but as long as money rules the world and chemical companies have a lot of money we will have to settle for what's force fed to us.