Real talk: these will CHANGE YOUR LIFE. I cannot begin to add up the thousands of dollars of shirts I have thrown away, dry cleaning bills for suits, and even higher suit costs due to ruining jackets before the wool wears out - all due to sweat stains.

I was doubtful that anything would ever help to be honest. I sweat through an undershirt usually in 5 minutes or less. From there, I sweat into my dress shirt over the following 15 minutes. Within a half hour, I am sweating directly into my suit jacket or blazer. I have had these shirts now for a few weeks, and I can only recall one day where I sweated through the underarm pads, and even then I only left a very small sweat mark in my shirt about the size of a quarter.

If you wear suits and you sweat a lot, I strongly recommend getting at least enough of these to wear for a week. Spending $200-$300 on undershirts might sound insane to some, but if you wear any nice clothing that you want to protect from getting ruined, it's so worth it. Please note that they do fit as described in the description and in some user questions. The Large slim fit shirts are designed for a 42-44" chest, as opposed to most undershirts or T-shirts that are sized for a Medium shirt to fit a 42" chest.