In the beginning I did not trust.
My grandmother always says that acrylic is bad, your skin doesn’t breath. Cotton is better.
Then I tried microfiber t-shirts, bought at Decathlon. For 5 or 6 euro, you will have a t-shirt that doesn’t soak in sweat, it’s easy to wash, it dries in a flash and it could be folded into your trousers pockets.
I’ll let my grandmother try them, sooner or later …