Overall it's a good, reasonably-comfortable T-shirt to wear working out
356488
Overall it's a good, reasonably-comfortable T-shirt to wear working out, casually around the house, or for sleeping in.  I give it 4 instead of 5 stars because while the quality is good, it's not the absolute best I've seen.  After having only washed it a couple times, it looks and feels more like a shirt that has been washed dozens of times.
3795406
This very thin shirt isn't quite comparable in warmth to the midweight Duofold pants I pair it with, but it works a little better for me under a dress shirt (and I of course have the option to put on a warm coat).

This works best for me under a normal cotton t-shirt when I'm dressing for work. If I overheat a little, it's no problem: the material doesn't really retain sweat, so I don't get any damp spots, and body odor stays manageable.

I picked the gray color, thinking it would be a lighter shade than it is in actuality, mainly so I could easily distinguish from the white cotton tee's in the laundry basket. My mistake, the gray is quite dark -- enough so that it shows through any light-colored dress shirt. But it hides well under a white cotton tee.

According to Duofold's sizing guidelines, I should have chosen their size Large (me: 42" chest/36" waist), but I like a slim fit under my work clothes, so the Medium size fits perfectly. The Medium fits approximately the same as the Kirkland (Costco) Medium tees I wear.
4460137
I bought this through the lightning deal and its essentially a wetsuit with a lower neckline, but it serves its purpose and makes you sweat.  Im a 58 male, 145-148lbs, lean, in good shape, but not quite where I want to be in terms of body fat percentage.  I typically wear size 30x30 pants or jeans and mens size small shirts for most brands, so I followed the size chart and ordered the Regular size that was supposed to be an equivalent S/M (small/medium).  When I received the suit, it was marked as a Medium, but fit me pretty well.  It was a little tight on the shoulders, but nothing that caused discomfort or restricted movement during my workouts.  I would suggest wearing a sweat wicking base layer (i.e. Under Armour, Nike Dri-Fit, etc) for your top and bottom under the suit, otherwise you're going to have a sea of sweat in the suit.  Ive done deadlifts, thrusters, squats, jumping jacks, bench presses, push presses, pull ups, etc and have had no problems with range of motion or movement.  It does feel a little looser in the torso, but maybe that helps to accommodate folks with bigger tummies.  Overall, I like it, but I think if you can find an equivalent shorty wetsuit for cheaper, you could probably use that instead.  Just remember though, that wetsuits typically have a higher neckline.
2033889
The best way to review this shirt is by comparing it to the white Fruit of the Loom muscle shirts that most of us have bought from local box stores.  This muscle shirt looks more like a shirt that you could wear out when going to the gym, picking up groceries, at your kids baseball practice, etc.  The FOTL shirts are meant more as an under shirt.  The material is 60% cotton and 40% polyester I believe.  That means you should get little to no shrinking during laundry days.  As far as the fit is concerned, it is a tad looser than FOTL.  I'm 6'1, 220 pounds, work out 4 days per week but have a gut.  My xl FOTL is snug all over especially my mid section.  This shirt is not as tight even though it's the same size.  If it were a shoe, it would probably fall into the category of being a 1/2 size bigger.  Overall, I'm happy with my purchase and plan on getting a few more.
2816955
I bought this to wear to the gym, but it is nice enough to wear out as a top. For gym use, I would have preferred the waist and wrists to be a little tighter. Overall I liked it enough to buy more than one.
3840165
Arms are a bit snug, body is a little loose, but overall a very comfortable shirt that looks good on me.
3198739
Overall a good product, fits well and comfortable.
2303393
This shirt is soft and durable. It did not shrink or get damaged after drying it on high heat. Normal wash is fine. The material feels soft and sort-of thick for a workout shirt, but I did not feel hot when I worked out while wearing it. This shirt looks much better than a regular t-shirt and is fine for everyday wear. The initial quality seems like it will last for a long time.
195117
Not as loose as most cotton t-shirts but after wearing it for an hour or so, it conformed to my body and was fine. I worked in it with heavy weights so...it broke in fine
1948154
It's perfect for what I wanted. It's not a premium quality T-shirt and I didn't expect it to be, but it is miles ahead of so many cheap screen printed shirts that sell based solely on the artwork. It is comfortable and it fits the way a shirt like this should, which is to say, an XL is an XL but the collar opening is still relatively small (big, loose collars just look sloppy, not a problem here) and the sleeves are tight while the body is a relaxed fit. I have been lifting weights in mine.
2019496
Overall, I am satisfied with this T-shirt, although the graphics on the back of shirt are not as vivid as depicted online.
3783512
I ordered 3X and the fit was a little bit tight.  On the plus side, it will motivate me to continue my gym membership.  Also, The color indicated charcoal, but it is more a gray/blue color. I don't really mind that either, but I prefer that items come as advertised.  I give this 3 stars because the fabric seems to be good quality (not flimsy) and of course the coolness factor.  Overall, I am happy with the T-Shirt.
3893386
Decent for the price; relatively comfortable.
1855257
The fit was good, just as I hoped.  It really does have a point collar, so it makes a tie look tidy.  The fabric is a little scratchy just out of the package (I had hoped for a little softer), but it's at the cleaners; we'll see how it is when it comes back.  Overall, it seems like a good investment.  Other fitted shirts I have tried recently pull apart at the chest when I put my hands on my hips--they obviously are cut incorrectly.  This shirt is fine in that regard. The price was appropriate, and the item arrived in good time.
374794
This is a comfortable workout shirt with a smooth, soft fabric. It looks good -- the neckline is somewhere in between a standard crewneck and a larger scoop neck -- and the fabric stays cool when exercising.

In terms of washing, it does well on the delicate cycle with cold water, followed by hang dry.

It does run a bit large, though, so I'd recommend ordering your normal size or one size down.
1791811
I'm 5'3" and almost 110 lbs. The shirt fits quite loose on me that I can wear a long sleeve thermal shirt inside. The shirt is barely long enough to cover my butt, so I wouldn't just wear leggings (or nothing as the model). Please note that the color it's not navy blue and grey as the picture, but closer to black and grey. Also, it doesn't shrink even after tumble-dried. Overall, it's a good shirt and it's quite comfortable.
1386652
This shirt arrived in a short amount of time and in good condition. I am 5'8" and 130 lbs and ordered a medium. It fits my torso fine, but I was hoping it would be a more relaxed material (maybe it will soften as I wash it), and the sleeves are kind of wide. Also it's a little shorter than I like my t shirts. It's good quality-I got the white and it's not see-through. Overall it's fine, but I'm not in love with it. Will keep it.