Skip to content
    • Adaptable Bras
    • Bralette
    • Essentials Soft Bra
    • Racerback Soft Bra
    • Soft Sports Bra
    • View All
    • Bikini
    • Briefs
    • Boy Shorts
    • Hipster
    • 4.5" Trunks
    • 6" Fly Boxer Briefs
    • 9" Boxer Briefs
    • High Rise
    • Period Underwear
    • Thong
    • View All
  • Pack + Save
    • Lounge + Sleep
    • Socks
    • Swim
    • Tees & Tanks
    • Tomboy Accessories
    • Best Sellers
    • First Line
    • New Arrivals
    • Performance
    • Rainbow Collection
    • Signature Prints
    • TENCELâ„¢ Modal
    • The Gift Shop
  • Last Chance
    • Community
    • Our Story
    • Sustainability
  • Account
  • Gift Card
  • TomboyX Rewards
  • Wishlist

MY CART

TomboyX
TomboyX Rewards
  • Bras
    • Adaptable Bras
    • Bralette
    • Essentials Soft Bra
    • Racerback Soft Bra
    • Soft Sports Bra
    • View All
  • Underwear
    • Bikini
    • Briefs
    • Boy Shorts
    • Hipster
    • 4.5" Trunks
    • 6" Fly Boxer Briefs
    • 9" Boxer Briefs
    • High Rise
    • Period Underwear
    • Thong
    • View All
  • Pack + Save
  • Apparel
    • Lounge + Sleep
    • Socks
    • Swim
    • Tees & Tanks
    • Tomboy Accessories
  • Collections
    • Best Sellers
    • First Line
    • New Arrivals
    • Performance
    • Rainbow Collection
    • Signature Prints
    • TENCELâ„¢ Modal
    • The Gift Shop
  • Last Chance
  • About Us
    • Community
    • Our Story
    • Sustainability

Filters

Style

  • Bikini
  • 4.5" Trunks
  • 9" Boxer Briefs

Size

  • XS
  • S
  • L
  • XL
  • 2X
  • 3X
  • 4X
  • 5X
  • 6X
  • 3XS
  • 2XS

Fabric

  • First Line Leakproof
Grey Clear
  • Grey

  • first line :: Leakproof Underwear
clear
Remove Filters

first line :: Leakproof Underwear

Our leakproof undies just got even better. Now in new colors with new bands, and in an expanded size range from 3XS to 6X, we are giving you the same protection and more ways to wear it.

Our leakproof undies just got even better. Now in new colors with new bands, and in an expanded size range from 3XS to 6X, we are giving you the same protection and more ways to wear it.

Style

  • Bikini
  • 4.5" Trunks
  • 9" Boxer Briefs

Size

  • XS
  • S
  • L
  • XL
  • 2X
  • 3X
  • 4X
  • 5X
  • 6X
  • 3XS
  • 2XS

Fabric

  • First Line Leakproof
Grey Clear
  • Grey

Collection

  • first line :: Leakproof Underwear
clear
Remove Filters

Sort By

  • Featured
  • Price: Low to High
  • Price: High to Low
  • Newest
  • Oldest
  • Best Selling

Sort By

  • Featured
  • Price: Low to High
  • Price: High to Low
  • Newest
  • Oldest
  • Best Selling
NOW IN 3XS-6X
Exclusive: First Line Leakproof Bikini - Iron-Underwear-TomboyX

First Line Leakproof Bikini

Iron

$25.00

NOW IN 3XS-6X
Exclusive: First Line Leakproof 4.5

First Line Leakproof 4.5" Trunks

Iron

$32.00

new style
Exclusive: First Line Leakproof 9

First Line Leakproof 9" Boxer Briefs

Iron

$36.00

Bikini First Line - Next Gen Iron-Underwear-TomboyX

First Line Leakproof Bikini LC

Next Gen Iron

$22.00 $19.99

  • Refer a Friend
    • My Account
    • Customer Service
    • Returns
    • Contact Us
    • Accessibility
    • About Us
    • Careers
    • Press
    • Ambassador Program
    • TomboyX Rewards
Copyright ©2021 TOMBOYX
  • Terms & Conditions
  • Privacy Policy