I’m surprised that Aronia asks SF opinion about such a subjective as “softness”. One man’s softness is another’s brutalist concrete. The only way is to try it on and return it. Have you purchased such an item before? Your choices for this item span the globe and with your description it seems like you may be fishing for something here. Dunno. Just seems like such a sophisticated question for such a simple and widely available garment. Try UNIQLO or any of the above suggestions if you’re truly stumped. Bonne chance!
Greetings! Having sensitive skin has been challenging when it comes to shirts. Pants/leggings are not a problem but the upper body is a more difficult situation. A dermatologist once explained to me that through genetic variations some people have such sensitive skin that they can detect minor variations in variables such as fabric composition that affect skin temperature, galvonic skin response, etc. I'm not sure of all the neurological nuances but the end result is a totally subjective feeling of "soft," which as you suggest is relative to each individual. The suggestions here thus far have been helpful and I follow-up on every lead.