Camelflage

"Camelflage" is a cleverly-named feminine "visual privacy undergarment," described by the manufacturer as follows:

If you are an active, fashion conscious or contemporary woman then Camelflage panties are for you. These aren't your ordinary panty, they were specifically designed to smooth out your feminine parts under tight clothing. Yoga and exercise pants, leggings, tight shorts, skinny jeans or even some work trousers can have a shorter inseam. You have enough to worry about these days; the last thing you need to think about is your panties riding up during your cardio kick boxing class.

Grammatically awkward, but reasonably self-explanatory. Via Fritinancy, which presented this as "relief for the heartbreak of cameltoe."  Those unfamiliar with "cameltoe" can read about the subject at Wikipedia.