I ordered two of these 'under-Shirts ". After repeated contribute current temperatures (-7 degrees C. at night), I can say that I am pleasantly surprised. Clear Do not expect miracles but comparable to similar products, for example, Nike is here already clearly warming! The workmanship is very good. Even the logo is attached to the collar laterally offset so that it can also be worn without hesitation under uniforms. The dimensions are also super. I have size M, am 189cm tall and of powerful build. The shirt fits tightly (should it also, then it warms better), the sleeves cover the wrist completely, the abdomen and back, it is so long that it remains even after repeated bending in the pants and not slip out. Flexibility is ensured, it spans nothing if you were rowing for example with the poor! Only "negative" point: Unpacking proposes a chemical mace nose flat. The smell was but after the first wash away. Let's just say that the Prodkut absolutely does the job and I'm happy with it!
