Last year's Under Armour Heat Gear Sonic Long Sleeve Shirts were definitely a five star product. However, I think this year's model is not as good.

To be absolutely clear, in my opinion this is still probably the best compression shirt available on the market. In this area, Under Armour is still outpacing other brands like Nike by a *long* shot. The shirts are true compression, the materials wicks sweat really well, the size and cut are good, and the raglan sleeve style looks a lot nicer than standard sleeves.

I dropped a few stars however, because I feel like this is a case of trying to fix a product that isn't broken. Last year's line was perfect and none of the changes in this year's line are improvements. There seem to be two major changes:

1) Contrast color stitching was added as a design element:
The old shirts were all one solid color, whereas these shirts have weird lines of brightly colored stitches running down the sides, chest and inside of the arms. This is pretty annoying because most other lines of Under Armour compression shirts have gone the direction of gaudy designs and patterns (I'm an adult so I don't want to look like a superhero, walking UA billboard, or pretend soldier). The major appeal of this line has been the clean and neat look. These shirts were originally meant to be a functional base layer, so I'd prefer to keep them looking this way. The extra ornamentation is unnecessary and even distracting when you pair them with parts of another uniform with its own design pattern.

2) A different more mesh like material is used on the inside and underside of the arms:
I guess the idea here was that this material would make these areas more breathable and less restrictive. It's a good idea in theory, and it might do that, but I don't really notice. What I do notice is that it compromises the compression of the shirt in and around these areas. Particularly after you've started sweating. It also makes the shirt just feel more 'substantial'. Which is not a good thing, since the shirt should feel like a second skin. In short, the trade off isn't worth it.

3) Ok, I only said two, but I also prefer the neckline from last year's model, this one feels too big.

To repeat though, these are probably still the best compression shirts on the market. I've tried a good amount of brands and haven't encountered anything that comes close.

For anyone curious about sizing, I am 5'11.5" and 157 lb. I have a slender muscular build with significant tapering from shoulders to waist. I prefer a very tight fit and wear a Small. I used to wear a medium but I noticed that after 3 washes, these shirts tend to loosen up slightly (you won't notice when you first put them on, but after you start sweating post-3rd wash you'll notice). So a used small ends up fitting like a brand new medium when actually in use. If you're my size, Small is the way to go for real compression and Medium is good if you prefer something slightly more comfortable and easier to put on. In either case the arm length and torso length seem fine.

Oh yeah, also I wash these in cold and line dry, but I've thrown them in a dryer on high before and they didn't shrink.

I don't know what has happened to Under Armour in the last few years. I own a LOT of their compression gear for working out and mitigating neuromuscular pain. The heatgear compression shirts of like 5 years ago were AWESOME -- they provide a great amount of compression (like a massage all over), look great and make me feel locked in and protected when I work out somehow. I think it's the fabric composition -- heatgear used to be nylon/elastene, but in the past 2 years or so the heatgear fabric has switched to polyester/elastene. It makes a big difference IMO. This shirt is comfy as a baselayer but provides basically no compression. And GUESS WHAT? I went a whole size down! I'm squarely in the Large in the sizing chart, but last year I bought a large Heatgear Sonic "compression" shirt and it does absolutely nothing. So this shirt is a medium and it STILL doesn't provide enough compression as far as I'm concerned. I *almost* bought a small because my old heatgear shirts are smalls and I still wear them. I've gained weight since buying those so was hesitant about getting a new small (maybe my old shirts have stretched out a bit), but I really think I could/should wear a small in this shirt today. The sleeves are too long and it just doesn't feel like "armour" honestly. I bought it from a third party so I can't return it (I don't want the hassle and to pay for shipping back), so I'll keep it as a baselayer for winter. So disappointing -- UA had their gear nailed and somehow have lost the golden touch over the years. Sad really. Don't pay full price for this shirt -- either look elsewhere or wait until they go on sale.

If you want a true compression long sleeve shirt that is affordable, I highly recommend CompressionZ here on Amazon. Check them out -- I already own a lot of their gear to replace my UA stuff.

I have a number of these UA compression tops in Midnight Navy & White which I use for sports and as a general undershirt. I'm 5'11'' & >300lbs and I find the 4XL Tall sizes good, they give me a decent coverage on back and stomach, they stay tucked into jeans/chinos/sportswear well and there never chaffing in the armpits etc.
I have 2 in Grey (1 x S/S & 1 x L/S) and both seem slightly SMALLER but distinctly SHORTER in terms of body length.
Overall the quality is good as you'd expect with UA but if you want that longer length, say if you're tall or have a bit of a gut I'd opt for the Navy etc. over the Grey as they don't give you that coverage and they ride up when running etc.
I would still buy UA Compression tops, but not in this colour.

I love the sleeve length and the waist length. I am a 400lb 6ft tall woman and the 3x is a little big. That was very shocking to me. Im going to order a 2x to see if it is a better fit but im keeping the 3x to wear under my workout clothes anyway.

Perfect for a breathable undershirt. I use it to cover my tattoos at work. If you get white you can slightly see your tattoos through the material if you really look. Very comfortable though. I purchased the tall and its perfect. I couldn't imagine how short the regular is lol. My recommendation is just get a tall if its in stock.

Great quality! I bought this one and one of a different brand and the under armour I'd still in perfect condition and the other is not and I wear the under armor more then the other one and the price difference was only like 10 bucks

Beautiful quality but comes really small. My man is L got him XL and it's wearable but feels really tight to him (it's meant to be tight though, so if you don't mind then you will be happy)

Good top, comfortable, good wicking and nice quality, I wear it for cycling as a base layer.
Only negative is that it doesn't feel as though it does much to keep the heat in, I often feel the cold on my arms even beneath a fleece, possibly because it is so good at wicking.

Nice

as described

Nice fit, good product. Long in arms.

Good quality, pleasant to wear. Only - maybe material is not so good like in some similar products (some similar bases have some better material for sweeting - without unpleasant smell).

Still look like sausage in it (prick before cooking)

Perfect layer to wear under any sports wear. Fits really nice.

Good fit

very good for cold days; i did not try it in the gym yet but is good in cold weather

nice fit good quality top

Was expecting it to be red but more like bright orange! However fits a treat!

Great price and the s-small fits like a glove ever though I'm a small in shirts..

Nice top, thanks

Good