Not Breathable - Inappropriate for Vigerous Physical Activity
931937
Fit was fine and they were warm.  Would be suitable for snowmobiling or directing traffic in a ski area parking lot; however, not appropriate for athletic skiing.  They are advertised as "Water resistant, wind resistant, advanced insulation, reinforced seams", all true.  However, the water-resistant and wind-resistant layer is impermeable, they do not breath.  The first day that I used them I sweated profusely!  I was overheated and could almost wring the water out of the bibs.  They took a couple days to dry completely.  I chalked it up to being over-dressed on a relatively warm day.  However, I got the same results when skiing in sub-zero weather the next time. I began to wonder if the bibs were breathing properly so I inspected the exterior Velcro tabbed pocket on the leg, the only unlined portion of the bibs.  Sure enough, the exterior fabric is windproof and waterproof but fully rubberized on the back side!  I don't think that these bibs breath perspiration out at all, hence the steam room effect.
2501049
Comfortable, but not breathable at all.. and if you sweat wearing them it's very obvious with the blue color. Also, would not recommend these for yoga.
3924610
I don't like the polyester. Thermal underwear should NOT be made of polyester. It does NOT allow the body to breath. I wore it. Had to due landscaping work at my place of employment. I was mowing a lot of lawn to be exact and on uneven ground. I was building up a sweat, is my point.  Polyester makes you perspire even more, then when you are not moving, you get chilled because the perspiration can not evaporate because it's made of POLYESTER. I would not buy these again.  Always read what the item is made from.  I will be looking for cotton or silk. A natural fiber for future Thermal Underwear. Everything else was great, just the material they are made from makes them useless. You purchase thermal underwear for warmth, but with polyester you get chilled...what's the point? Sorry, I really don't like giving negative reviews, but I must be honest.
2633588
I loved these when I used them in Atlanta, specially during winter.
Now Ive moved to a very hot and humid place and its not breathable at all. And I discovered this the worst way, so if you live in a hot and humid climate, use cotton underwear. These are mainly polyester.
4123633
This is perfect size for outdoor fitness: bottle of water, glasses, wallet, key and cell, some gears. However, you back is getting so hot because of fabric- you feel very uncomfortable. We are not able to use it.
1982023
These shoes fit well and provide excellent traction on uneven terrain. I have used this running and hiking. My big problem with these shoes are that they are NOT breathable at all! I think actually worse than my Gore-Tex boots. Not sure if this is an manufacturing error or by design, but if you are wearing this for any extended period of time i.e. day hikes, backpacking, etc, expect to be taking these on and off to air out and dry out the mushy, wet interior.
4559679
These balaclavas make it a little bit difficult to breathe, especially when you are short of breath. The lack of holes for breathing is the reason that this balaclava has this issue. In single digit weather (fahrenheit) I had to double up these with a thicker mask that only covered my mouth/nose. With this combination along with my helmet, I was able to keep my neck, face, and ears warm. The difficulty of breathing really is a huge con for me, and with that along with the need for me to use this with another face mask is the reason why I deducted two stars.
2185925
They don't breathe. These are exactly what you don't want to play sports or workout in.
3934219
They say breathable, nope.  Washable, nope, looks like "H"  Not a good choice, wish i could return it.
2785138
About half of the socks are very ugly, and I will not wear them. The other half look cool. However, they do not breathe well. What do I mean by "breathe"? My feet feel like they are suffocating. They get super hot and begin to sweat while wearing them. I would stay away from this product unless you have a high tolerance for sweaty feet. To note, this does not happen to my feet with other Puma or Nike socks which are a similar style.
2088429
Not breathable, ended up sweating like a bag inside and got really cold. I have a specialized Element Jacket 1.0 thinner but much better breathability. The Sugio jacket is thicker then Element 1.0 jacket but you ended up colder since it's like wearing a plastic bag.
1780397
This is not a compression shirt or nor something you could consider a useful base layer.  I would not buy this again.  It's fine it you just a want a tight long-sleeve shirt, but it's just not good to use for any sort of workout.  It does not wick moisture, it does not dry all that quickly, and is not warm in cold weather nor cool in hot weather.
3452402
Nice fit however not very  breathable defiantly not a shirt you'd wear in humid weather
3532280
looks and material are great! but just unbreathable.....so u gonna sweat a lot on hot days.....so keep this in mind..
2123747
I bought these gloves based on the title of the product and the description, but when I received these all bets were off. The liner is not breathable, so your hands start to sweat. The "winter plus" is a joke. I used these(or tried to at least) at work in the freezer for moving boxes and such. My fingers will never forgive me after they became extremely cold to the point I had to switch gloves. The "waterproof" is well, I guess good, but as I said earlier, when your hands start to sweat, does it really matter any more? I will be returning these and looking elsewhere. Don't make the same assumption I did and believe the title.
4413841
I am not quite sure which part of this jacket is breathable. Most certainly, overall it is NOT!

After a few minutes of wearing, moisture started condensing on the inside. After two hours everything I was wearing underneath was soaking wet (of sweat), cold and uncomfortable. After coming back I had to turn this jacket inside out and wipe it with towel before leaving it out for drying.

Feels like made of plastic wrap. Would not buy again.
2117193
Material on the inside is non breathable almost a yoga mat rubber, recipe for skin infection.  If you are postpartum mother looking for binder, look no further than Bellefit.