They are not particularly compressive (they are tights, but not TIGHT tights), but they are probably my favorite Winter tight for temps in the 30s and 40s--especially for the price. They are super stretchy and run long. I don't have long legs at all, but I have always thought it's nice that they are long, since most insulated tights strike me as something that wouldn't work for anyone with long legs. They wick well and are warm. Only thing they could use would be ankle zippers and a pocket of some sort.
MTA: that they are fabulous on the bike over regular bike shorts.