Claire, you are such a flatterer. And you are also so SMART. How clever to think of the fabric content!
Here's the breakdown:
The Real Straight is 80% cotton, 19% Polyester, 1% spandex.
The Always Skinny is 99% cotton, 1% elastane.
The Long and Lean is 98% cotton, 2% spandex.
My AT Modern Fit Skinnies are 99% cotton, 1% spandex.
It's going to be REALLY interesting to watch the shrinkage and stretching in these different fabrics!
You are right that the Always Skinny is not as snug as my AT skinnies on the calf area; those are more like jeggings on me. They also stretch out a bit more than I would like, but I bought them a bit large, so that is part of the issue. If I wear with a belt it is no problem; if not, they sort of crawl down and down and down, especially if tucked into boots. (Still need to try the shoelace trick to hold them up). But the Always Skinny could definitely fill a need, both for another tucking jean, and a narrow jean I could wear without tucking.
The Long and Leans also stretch out on me, but in that case I don't mind them being a bit looser.
So far, after a day and a half of wear, the Real Straight seem to be maintaining their shape quite well. There is a bit of stretch in the bum, but I wouldn't say it's all bagging out in an awful way.