Thinx Review 2024
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Reliable and comfortable period underwear (which is specifically designed to absorb menstrual fluid) can improve your period experience. And many styles are now as chic as they are effective.
But over four years of trying out more than 40 pairs from 20 different brands, we’ve found that some menstrual-underwear styles are gorgeous but leaky, while others have Hoover Dam–level security but diaper-like silhouettes. The styles that will be best for you depends on your period flow and preferences.
How we picked
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Leak prevention
We looked for period underwear that offers full coverage, with multiple layers of absorbent (or fluid-containing) fabrics.
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Size options
The best period underwear fits every body.
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Wash- and wearability
We laundered underwear according to the manufacturers’ instructions, monitoring how washing affected the garments over time.
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Comfort (and style)
Period underwear worth the investment is as chic and comfortable as it is effective. We’ve tried more than 40 styles.
Why they’re great: The retro-style, bloat-friendly Thinx Hi-Waist period panties are worthy of both Fashion Week and Leak Week. This pair features a highly absorbent, opaque middle panel flanked by super-stretchy and breathable mesh panels, which put the “fun” in functionality.
The Thinx pair is one of the chicest and most comfortable pairs we’ve tested (the style is, as one tester put it, “a period-sex-worthy panty”). These underwear are also among the most leakproof styles we’ve tested. When devoid of fluid, the Thinx Hi-Waist panties feel almost like wearing regular underwear. When full, they feel heavier but not soggy, and the gusset does not become puffy like on some other pairs we tested.
At $35 a pair, this underwear is fairly pricey, but it’s also high-quality and long-lasting: Over two years, one of our testers ran this pair through the dryer on high heat at least 50 times after washing in cold water. And when this pair was placed next to a brand-new pair, the washed pair still looked almost new, with no color fading or snags in the mesh and very few frays to the gusset.
All Thinx underwear is Oeko-Tex–certified, meaning it has been found to be free of “harmful substances,” per the Switzerland-based independent research organization.
Price per pair: $35 at the time of publication
Absorbent coverage: full (front waistband to rear waistband)
Sizes: XS (from 35-inch hip) to 4XL (up to 59-inch hip)
Fit: mostly true to size
Options: three colors (dusk, spicy, and black)
Care instructions: Wash on cold on a delicate cycle, no softener or bleach; hang to dry. Do not iron.
Return policy: Thinx underwear can be returned within 45 days of purchase.
Claimed absorbency: equivalent to five tampons
Gusset materials: PU (polyurethane) fabric, polyester, Agion, and Lava XL-N
Who this is for
Though period underwear can hold more than a tampon’s worth of fluid, if you’ve never free-bled into underwear, it may take some getting used to. Some people prefer to use period underwear as a backup method of leak control, rather than as a first line of defense in managing menstrual flow. If you find yourself experiencing or worrying about leaks during your period, or if you’re anticipating the start of your menstrual cycle but you’re not sure of the exact date, a pair of absorbent undies can provide peace of mind and will be more comfortable to wear than most pads or panty liners.