THUS I wanted something warm and confy, but I did not need top notch equipment. Another requirement, For Which I was willing to pay the extra mile what the smell. I do sport and oft I have an assortment of T-shirts and such did take a severe pounding and, with the time they will smell .. .and They Do not smell that good. I always wash them + 40 ° C and pre-wash program. Still, They pick up some smell ... with time, thesis stink after the 1st wash already!
My cheapest shirts are cheaper than this, from Quechua, and gave much better result.
Regarding the performance, They hot you up all right, But They do not retain heat at all. Their heat retaining capabilities after biking, waiting in the platform and biking cycle are much inferior to my Quechua ones. They are so much heavier.
I have used them for walking, under light load and not nearly Pace, but cold conditions, in a normal 3 layer configuration with a cheap fleece and a non-breathable rain coat. Result? my fleece which drenched and worked better as "underwear" than the underwear. In the way to go, in the car, They worked perfectly though. If That is what the seller and maker understand by "sport", I think there is some problem of definition.
I will definitely not recommend anybody to use this article, buy it or smell it.