I don't want to guilt-trip you, Internet, but do you know how much a stack of September fashion magazines costs? Or how heavy they are? I wanted to edumacate myself on trends for Fall, 2008, so I bought a bunch and hauled them home. And got a hernia. And now it turns out that hauling fashion magazines around doesn't even count for Weight Watchers activity points, even though it should.

But I'm a plucky little BlogHer Contributing Editor, so I forge ahead, bravely offering a quiz for you to take. There will be no prizes, just the warm glow of accomplishment when you get the answer right. And you will. (Hint: check out my title.)

Q. What do this $2,200 Zac Posen minidress from Saks Fifth Avenue

and this $88 "European Collection" minidress from the Gap have in common?

If you answered: "The models are wearing TIGHTS," then ding ding ding! We have a winner!

Yes, far be it from me to utter the dreaded word "pantyhose," but tights are definitely back in style. However, things have changed in the past 15 years.

Here's what you need to know about tights 2.0: Spandex is now a crucial factor. With two percent spandex, tights won't wrinkle or sag. With eight percent Spandex, they'll make you feel quite Wonder Womanly. Anything more than eight percent Spandex counts as "bodywear."

Since Spandex will keep your tights from puddling around your ankles, you don't need to worry about tights being too big. Feel free to go up a size if like me, you're short-waisted and long-legged. But keep your tights out of the dryer--Spandex and dryers don't mix.

You can find interesting collections online at American Apparel, J. Crew, and of course, Hue.

Target has a nice assortment of textured tights, and the price is right.

And for those of you who live in the frozen north, Vermont Country Store has some ribbed, wool-blend tights that are so incredibly warm and soft, you'll wonder how anyone managed to talk you into going out bare legged after Labor Day.