First Line Leakproof Bikini - Night Sky X=-Underwear-TomboyX
First Line Leakproof Bikini - Night Sky X=-Underwear-TomboyX

First Line Leakproof Bikini - Night Sky X=

Regular price $25.00 Sale price$9.99 Save 60%
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Solids
Color: Night Sky X=
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Complete the set

No leaks, no mess, no worries. First Line is here to keep you dry and on the go (or on the couch).

With built-in leak protection for light days and incontinence, you’ll be able to rest, move, and breathe easy. And hey — they’re antibacterial and odor-repellent, all while looking and feeling just like your favorite Tomboys. Plus, the outside fabric is also leak resistant for even more protection.

First Line underwear is made with OEKO-TEX® 100 Certified fabrics which are free from chemicals that are toxic to humans including PFOS and PFOA chemicals that have been shown to cause infertility or cancer. Learn more.

  • Fit-tested on all body types, sizes 3XS-6X
  • Looks and fits just like regular TomboyX Underwear
  • Body: 95% OEKO-TEX Certified cotton, 5% spandex
    Liner: 90% polyester, 10% spandex
  • Holds 8 tsps of liquid
  • Signature stay-put X= Black waistband
  • Smooth, durable flatlock seams won’t irritate or chafe
  • Machine wash cold in a mesh bag, line dries overnight. Avoid machine drying.
For more details, check out our Fit Guide
  • Machine Wash Cold with like colors
  • Tumble Dry Low with like colors

All product life span is improved with hand wash and lay flat drying, but if you don’t have the ability or time, delicate wash in your washing machine is fine and low tumble in the dryer. This also extends the life of your prints.

High heat can damage the spandex and break it down or lose the retention quality.

For any technical fabrics, fabric softeners break down the performance properties. Stay away from added fabric softeners, in general.

For more details on things like our water activated, glow-in-the-dark prints, swim, Solarmesh, etc. please see our Wash & Care Guide. 

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Designed in Seattle, WA Since 2013

tomboyx builds silky-soft and long-lasting premium underwear for all bodies. We're committed to designing inclusive and sustainable products that help our customers feel comfortable in their own skin.

tomboyx Fit Guide