People People, when I read what is written here with sizes, then I have to wonder whether you have understood the principle of tech fit. The first thing you should be slim and little be trained, because it does not help when you're little tighter or belly has. No offense, but it brings only people what are the trains. And now to the size! ! ! ! ! Tech FIT MUST BE ENG (very tight) It is even true that you if you (M) carries in TECHFIT size (S) which is not a joke. I make high-performance sports and am also very much in the mountains during the boarding, I get no compression if I do not get pressure on the body and the muscles. When the to big bears is no voltage, then bring as well as logically, no compression. Who is well trained and M carries, can still buy Size (S), if you added it attracts first, you're not used to, but if you have the 10 minutes and running goes, then you realize quickly how it must sit very close. I bought the first time also (M) and wondered why it is so tight, when I was in the Adidas store then, me 2 sellers have said that M does not help and said always has to wear a number of small, I could not even believe. But were right. I am 186cm, and doing triathlon and Snowboard (regularly) I would describe myself as well trained, body fat 9.4% and wear large S in pond fit. As the seller gave me south, I thought the portion not pressed together, but only shortly afterwards I understood what the principle means tech fit. It has a reason why wear it under your soccer jerseys.