tomboyx | Premium Underwear for All Day Comfort. Fit for You.

First Line Period Bikini

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$15.6 $26 In stock

Category: first line period underwear

Leak protection made for real life. 

The period bikini is our highest-absorbency style for periods, pee, sweat, whatever. Feels like regular underwear so you can go about your day without that time of the month cramping your style.

  • Low rise
  • Absorbs up to 8 tsp (aka 6-7 regular tampons)
  • Room for a backup liner or winged pad on your heaviest days
  • 95% Cotton, 5% Spandex
  • Gusset: 89% Polyester, 11% Spandex
  • Inner Floating Gusset: 91% Polyester, 9% Spandex
  • PFA-free & OEKO-TEX® Certified
  • Machine wash & dryable just like our OG cotton undies
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Leo C. ★★★★★

These actually feel like a regular bikini, not a diaper at all, which is the biggest win for me. I wore them through a full workday and a spin class without a single worry, and the highest-absorbency claim held up completely.

Eva ★★★★★

I wore these on my heaviest day during a 10-hour work shift and forgot I even had them on, the fabric feels exactly like regular bikini underwear. The absorbency held up through sweat and everything else without any bunching or that damp feeling I was bracing for.

Steven ★★★★★

I’ve worn these through a full workday plus a commute and honestly forgot I had it on—the absorbency held up for my heaviest flow without that dreaded damp feeling. It’s genuinely as comfy as my regular bikini cut, but with way more peace of mind.

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