This is the most comfortable shirt I've worn in years. I have some lightweight cotton knit sleeveless shirts I wear as undershirts, this V neck is more comfortable, more lightweight, and feels better against my skin than those undershirts or anything else I've worn in recent memory.
I just got this shirt, so no chance to see how it feels in hot dry weather (we have no hot humid weather here, so I can't speak to hot and humid), but are regular house temperatures it feel awesome, neither too warm nor too cold, just right. It's early October and we're transitioning to cool weather, not yet cold. I'm looking forward to finding out how this shirt will work as a liner shirt or undershirt in really cold weather.
The navy is a bright and clear navy blue, sometimes "navy" can look a bit dull or muddy but this navy is very nice.
I'm a woman with broad shoulders and a wide chest (50" chest), I've been checking Wool and Prince's site occasionally for years now to see if they are making anything in my size, and when I saw an XXL this time I ordered it. It fits great. For men reading this review, I have pretty square shoulders for a woman, men's blazers look better on me than women's because of the shoulder angle, so if you're reading this yes, it should fit you well too.
Also, I'm 5'10" and this shirt comes down to just a bit higher than mid-thigh, so nice and long.
This is more expensive than I usually pay for a shirt, but it's definitely worth it. I'm already looking at my budget to see when I'll be able to buy some more of these shirts.
Very highly recommended.