Shapewear isn't just increasingly popular -- in some cases, it's a lifesaver. Even if you're not overweight, you've probably experienced an outfit that could benefit from a little below-the-surface smoothing action.

Photo: banglz.com

But, of course, that only disguises the problem, and you want more -- you want to get rid of the problem. The Smartslip is designed to do just that. Essentially, it's a fitted half-slip (similar to shapewear), but it's designed to "add slight, on-going resistance," giving you a workout with every step!

I tried out the fullrise version (goes from above the belly down to just above the knee). It definitely provides resistance -- I had to make a real effort to take long strides.

The website suggests you wear it beneath a skirt or over exercise leggings. While there's nothing objectionable about the way it looks, I can't get on board with wearing it as outerwear anywhere but in your own home. And, in case you don't wear skirts long enough to work with the fullrise version, they also offer a lowrise that starts below the belly button and ends on the thigh. Truthfully, though, I think you'd get much more of a workout from the full version.

The fullrise Smartslip is $46.95. Is it going to give you a fantastic workout? No, not really. However, if you wanted to burn a few extra calories while at work (while getting the benefit of wearing a slip), it could definitely be a good addition to your wardrobe.