I use the UA Heatgear compression shirts and love them. I am a remodeling contractor who lives in the desert, and sweating is part of my daily life but these shirts really help keep me cooler. Add in the fact that we are all big guys and you can see I know what I'm talking about. I have been buying mine on EBay and have been saving about 50% from what they cost retail. As I have been losing the weight, this has saved me a lot of money each time a shirt has become too big for me and I have had to buy a smaller size.