At first glance, it looks nice and warm; I would suggest one size bigger to make it more comfortable and to pair it with a hoodie.

Incredible, words are unnecessary. Since I bought it, I haven't caught a cold outside again. Truly very warm, convenient, and I have tested it in very low temperatures. I highly recommend it, it is clearly worth its money. I have had it for almost two years. Get it.

I recently bought it due to a trip to Geneva.
It was worn as a jacket, under the main coat, which was a softshell and had short sleeves, without thermal or thermal underwear.
I faced temperatures from -2 with snow, to 4-5 degrees Celsius with rain.
I didn't feel anything on my body, in fact, I even sweated at times.
It is very soft, perfectly hugs the body and keeps it perfectly warm. It has a strange hydrophobic character, as water does not absorb, but stays on the surface and easily shakes off. I compare it to a simple Columbia fleece (which costs twice as much) and I have to admit that the Athos is a real beast that will always stand up to the cold and strong wind.
It has a double zipper, which I must note requires some extra attention as it is particularly hard (I imagine it is so for heat preservation and not due to a flaw) when zipping up.
I would buy it again and again. Congratulations to Pentagon for this gem!

Thick, very good quality fleece with a high collar that covers the neck.. a real beast.. I took it out of the washing machine almost dry and I was speechless.. for testing, I let it dry inside the house to see how quickly it dries.. it is indeed as the description says..