Free weight exercises for the lower body are usually compound exercises that target several muscle groups at once, including the glutes, hamstrings, quads, calves and other, smaller leg muscles of the hips and groin.
So while you may start out wanting sexy glutes, when you take the time to work these muscles you'll feel better overall, have more energy, and you'll be able to take the stairs with no problem at all.
If you attend a fitness center or gym on a regular basis, you've probably seen some leg curl machines that target your hamstrings, and maybe a kickback machine that targets your glutes.
The Fit Flop boasts a built-in "micro-wobbleboard" that claims to activate the muscles in your mid-step and thus helps to tone your thighs, calves and even the troublesome glutes.
Although these super micro-sized bikinis may not have a lot of fabric to work with, they do allow you to flaunt your personality along with your rock hard abs and glutes!