Attention!!! This specific product is meant to be worn underneath clothes!
I wanted to wear it on the outside, but it was a bad idea because it was too transparent, resulting in my underwear being visible. Also, the leg hairs stick out.
I am 1.83 meters tall and weigh 82 kilograms, and the Medium size fit perfectly on me.
What can I say... I expected more to be honest, but in the end, I was disappointed. I returned it.

First time thermal leggings, for use in the gym.
Quality is quite good, it seems at first glance, as soon as you open the packaging.
The first try may be challenging, but from there you can see the compression (it takes the shape of the body). It is important to choose the right size.
From there on, the product really does what the description says. If you want it for temperatures around -10, I would recommend something thicker (e.g. woolen). This one is for those who exercise in winter (in indoor or outdoor spaces with normal winter temperatures).

Very good quality and fit but if you want it for the cold it is a bit thin. A similar company has thicker ones. For other use, it is perfect.

Very warm thermal! I wore it in Poland with temperatures close to zero and I didn't feel cold at all! Overall, it has very good under armour quality and great value for money!