These Seamless Undies Stay Hidden Under All Your Leggings

To find the best seamless underwear, we tapped our editors and contributors for their go-to picks. In order to address shoppers’ various preferences, we wanted to include a range of styles (thongs, briefs, bikinis in low-, mid-, and high-rise cuts). Each choice on this list has been worn at least 10 times (and washed in between) to gauge their durability. We evaluated them for their overall comfort; the quality of their material (how breathable it was; whether it retained its shape over time); and—of course—visibility.

We tested each style by wearing them beneath everything, from leggings to body-hugging dresses, to ensure no awkward lines or bunching. Our testers wore the underwear during everyday activities—commuting, lounging, working, exercising—to get a real sense of how each style performs in motion. We also considered value and practicality (strong underwear with tummy control might be what you reach for when headed to a wedding, but cheaper, less precious pieces may be better suited for daily wear). On this list, you’ll find a range of cuts, coverage levels, and brands that offer inclusive sizing and color options.