Meet HeatGear® Sonic: UA's newest and greatest baselayer innovation. Under Armour started the "performance" revolution with their original HeatGear® compression-the ultra-tight fit that increases muscle power and makes you feel invincible. This latest UA fabric wears like a second skin so you get the same powerful compression, plus extreme comfort for all-day wear.
I bought these as a replacement for my previous ones, the new ones are lighter and far more comfortable for running in, and hey are excellent value, these were definately the cheapest ones I found and I looked on a lot of web site.
I have another pair that I bought cheaply but these worked very well. I was running on a very hot day working up quite a sweat but the shorts remained comfortable and did not ride up at all. In fact I felt no need to adjust them. Essentially they did what I needed them to do.
I got size large. My size is 34" waist and I'm 6'1" and 175 lbs. The compression is good but light. Try a smaller size if you want high compression. Really comfortable. Compared with the black ones, the white fabric is softer and more comfortable.