It seems so thin. Is it OK to wear it when the temperature goes below -20F?
427028
No way. It's more for fall and mild winter days. Perhaps 20 above with slight breeze.
427029
-20F is very cold. That said, I have worn it as a sweater in +10F in the wind and with another longer winter coat over it I was very warm. A lot depends on wind chill, hat and gloves.
880111
No. You would want to look for Heat Gear items (designed to keep you cool on the heat). This is a Cold Gear item (designed to keep you warm in the cold).
129892
I probably wouldn't recommend. I used in the summer and was sweating because it is thick material, but I imagine it wouldn't do well in less than 10 degrees
722623
I think it would be great because of how light it is. It's also a great windbreaker. I don't think you'd get too hot.
395497
Depends on what you're wearing ;)It would be too warm for summer, but I'd say it's adequate for spring/fall colder nights.
83093
I live in the midwest and have worn this coat into temps down to -10, -25 with the wind chill. Without wind, keeping lightly active (walking my dogs), wearing layers beneath it, and staying out of the direct wind, I have been kept comfortably warm. If you are more active (skiing or snowshoeing) you should stay quite warm. The jacket does not block wind very well, so if you are in windy conditions I do not think it would be enough unless you wore some sort of windbreaker over it, but I'm not sure about trying to fit it under something else. I have worn a thick wool sweater under it without any problems.
81961
If you mean, will it keep you warm when the temperature is below freezing, the answer is yes. Wear them under your regular clothing and use appropriate cold weather gear when outdoors.
1189816
I haven't worn mine in the summer, but I think it would definitely be too hot. It's not like a regular underarmour shirt, it has a little extra insulation to keep you warm. If you're looking for a longsleeved workout shirt, I think Underarmour makes HeatGear that is specifically designed to be worn in warm weather.
1432815
Its definitely too warm in my opinion for the summer especially without a/c. Its a very thick material. Every baby is different however. You can always give it a try and if not return. Just know as other reviewers have pointed out it's essentially a snowsuit.
1213578
I would say that if you take it off for a little while around every 20 minutes of use and let your arms cool down, it should not be a problem. With that said, it is probably more dependent on whether or not you are using it in an air conditioned area, or the temperature in the location you are in. I personally have not found heat to be of any real issue while wearing them.
1978424
I don't know about hot weather. I bought it for cold and it works out well. it does seem to be breathable if that helps.
1529426
I have a light weight Down comforter which I will put on my bed when the weather warms. I would say thiscomforter would be to warm when the temperature reaches the sixties.
1132346
It is warm. I do like the sweatband as the rim of the cap but that might not be enough for hot tems.
223831
Each person is different and their tolerance to climate is going to be different. I tend to overheat easily and found that 45-65 with this product is great. It keeps me cool in the warmer weather and warm in the colder weather. However 65 might be the extreme of this weight. I would suggest a light weight merino wool base layer if you are going to be in 60+ degree weather. You can always strip down a layer but it is hard to strip off your base layer :)
512735
I am honestly unsure. I do not want to give you any wrong information. Its a pretty thick dressing so I would assume you would be ok from the sun if you wore this. Thank you.
2452
Not really! It's very light and breatheable. But I guess it also depends on what you wear underneath.
1336374
Its light enough to backpack in, however, I wouldn't use this under 35 degrees.