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. Our trunks feature a floating gusset that can fit a pad with wings for some extra coverage when you need it. 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
Body: 95% OEKO-TEX Certified cotton, 5% spandex Liner: 90% polyester, 10% spandex
Signature stay-put silky soft Rainbow waistband
Mid rise fit, 4.5" inseam
Holds 4 tsps of liquid
Smooth, durable flatlock seams won’t irritate or chafe
Machine wash cold in a mesh bag, line dry overnight. Avoid machine drying.

Alana is 5’11” and wearing a size 2X Lisa is 5’5” and wearing a size Medium

Be fiercely and unapologetically you. Browse our collections of bras, underwear & loungewear made for all genders, bodies & styles.

TomboyX

First Line Leakproof 4.5" Trunks - Night Sky Rainbow

Size

Color

Women's Clothing

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. Our trunks feature a floating gusset that can fit a pad with wings for some extra coverage when you need it. 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 XS-6X
Body: 95% OEKO-TEX Certified cotton, 5% spandex Liner: 90% polyester, 10% spandex
Signature stay-put silky soft Rainbow waistband
Mid rise fit, 9" inseam
Holds 4 tsps of liquid
Smooth, durable flatlock seams won’t irritate or chafe
Machine wash cold in a mesh bag, line dry overnight. Avoid machine drying.

First Line Leakproof 9" Boxer Briefs - Night Sky X=

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. Our trunks feature a floating gusset that can fit a pad with wings for some extra coverage when you need it. 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
Body: 95% OEKO-TEX Certified cotton, 5% spandex Liner: 90% polyester, 10% spandex
Signature stay-put silky soft Rainbow waistband
Mid rise fit, 4.5" inseam
Holds 4 tsps of liquid
Smooth, durable flatlock seams won’t irritate or chafe
Machine wash cold in a mesh bag, line dry overnight. Avoid machine drying.

Alana is 5’11” and wearing a size 2X Mariama is 5’7” and wearing a size Medium

First Line Leakproof 4.5" Trunks - Black Rainbow

3 for $36 on all regular priced socks, every day. Automatically applies in cart.

This low-cut pair features grippy ribbing at the ankle along with classic rainbow stripes and a dollop of green at the heels and toes. A double-ply, fine-gauge knit of Peruvian Pima cotton blended with stretch and finished off with a little extra softening delivers borderline absurd comfort all day long. A collaboration with our fellow Seattleites and comfort connoisseurs at Posie Turner.

One size fits most; women’s shoe sizes 5.5-10, men’s shoe sizes 4.5-8.5, European shoe sizes 36-41
75% Peruvian Pima cotton; 23% nylon; 2% spandex
2-ply combed, twisted yarn
200-needle knitting
Softened and steam-boarded
Hand-linked toes
Double cuffs
Made in Peru

Anklet Crew Socks Lc - Star Bright

Ankle Socks

We'll keep it brief - these are classic for a reason.Our supersoft, extra-breathable cotton blend is paired with a cut that won't ride up or let you down. That's why we think our full-coverage brief is an everyday hero.

Fit-tested on all body types, sizes XS-4X
Signature stay-put silky soft TomboyX waistband
95% OEKO-TEX Certified cotton, 5% spandex
Smooth, durable flatlock seams won't irritate or chafe
Low rise fit
Machine wash cold, tumble dry low

Iconic Briefs Lc - Denizens Of The Deep

Say hello to our wedgie-free wonder and our most popular silhouette. It’s full coverage for your cheeks. Our supersoft cotton blend gives just a hint of stretch and makes sure you stay comfy, while our signature stay-put waistband keeps it together without pinching or riding up.

Fit-tested on all body types, sizes XS-6X
Signature stay-put silky soft TomboyX waistband
95% OEKO-TEX Certified cotton, 5% spandex
Smooth, durable flatlock seams won’t irritate or chafe
Mid rise fit, 2.5” inseam
Machine wash cold, tumble dry low

Boy Shorts Lc - Later Gator

Briefs

Say hello to our wedgie-free wonder and our most popular silhouette. It’s full coverage for your cheeks. Our supersoft cotton blend gives just a hint of stretch and makes sure you stay comfy, while our signature stay-put waistband keeps it together without pinching or riding up.

Fit-tested on all body types, sizes XS-6X
Signature stay-put silky soft X=Black waistband
95% OEKO-TEX Certified cotton, 5% spandex
Smooth, durable flatlock seams won’t irritate or chafe
Mid rise fit, 2.5” inseam
Machine wash cold, tumble dry low

Boy Shorts Lc - Golden Night

Say hello to our wedgie-free wonder and our most popular silhouette.It's full coverage for your cheeks. Our supersoft cotton blend gives just a hint of stretch and makes sure you stay comfy, while our signature stay-put waistband keeps it together without pinching or riding up.

Fit-tested on all body types, sizes 3XS-6X
Signature stay-put silky soft TomboyX waistband
95% OEKO-TEX Certified cotton, 5% spandex
Smooth, durable flatlock seams won't irritate or chafe
Mid rise fit, 2.5" inseam
Machine wash cold, tumble dry low

Boy Shorts Lc - Denizens Of The Deep

A boy short for all, with softness you can't find anywhere else. Made from the soft, sustainable TENCEL™ Modal, our boy short gives you complete coverage, a soft stay-put waistband, and the feeling of wearing nothing at all with the security of wearing the best.

Fit-tested on all body types, sizes XS-4X
Signature stay-put silky soft Rainbow TomboyX waistband
Sustainably sourced from renewable beechwood trees
Mid rise, 2.5" inseam
95% TENCEL™ Modal, 5% spandex
Highly stretchy to accommodate different body types
Smooth, durable flatlock seams won't irritate or chafe
Machine wash cold, tumble dry low

Mariama is 5’7” and wearing a size Medium Alana is 5’11” and wearing a size 2X

Boy Shorts - Tencel™ Modal Black Rainbow

Our most popular cut in our softest fabric. A practical and cute cut in buttery-soft, breathable, and featherlight TENCEL™ Modal. Our signature stay-put waistband provides a reliable fit that won't bind or ride up.

Fit-tested on all body types, sizes XS-4X
Signature stay-put silky soft X= black waistband
Sustainably sourced from renewable beechwood trees
Mid rise, 2.5" inseam
95% TENCEL™ Modal, 5% spandex
Highly stretchy to accommodate different body types
Smooth, durable flatlock seams won’t irritate or chafe
Machine wash cold, tumble dry low

Boy Shorts - Tencel™ Modal Black

Say hello to our wedgie-free wonder and our most popular silhouette. It’s full coverage for your cheeks. Our supersoft cotton blend gives just a hint of stretch and makes sure you stay comfy, while our signature stay-put waistband keeps it together without pinching or riding up.

Fit-tested on all body types, sizes 3XS-6X
Signature stay-put silky soft X= Black waistband
95% OEKO-TEX Certified cotton, 5% spandex
Smooth, durable flatlock seams won’t irritate or chafe
Mid rise fit, 2.5” inseam
Machine wash cold, tumble dry low

Boy Shorts - Progress Pride Stripes

It’s our classic bra, and it’s here to support you. Made from the same quality supersoft cotton as our famous underwear. Double layered in the iconic Tomboy style, this bra offers the comfort of a bralette and full coverage so you won’t even notice you’re wearing it (what a relief).

Fit-tested on all body types, sizes XS-6X
Light support with no underwire or padding
Signature stay-put silky soft X= Black chestband
95% OEKO-TEX Certified cotton, 5% spandex
Scoop-neck front and back
Machine wash cold, tumble dry low

Essentials Soft Bra - Progress Pride Stripes

Bras

A bralette so soft we can’t seem to keep up with the demand. Made from the soft, sustainable TENCEL™ Modal, our popular bralette has a keyhole cutout in the front for definition, and our 1.5” silky chest band that won’t ever irritate or ride up no matter your cup size. We don’t see it as just a bra, more as a best friend.

Fit-tested on all body types, sizes XS-4X
Signature stay-put silky soft X= White chestband
Sustainably sourced from renewable beechwood trees
Cross-back adjustable straps
Light support with no underwire or padding
95% TENCEL™ Modal, 5% spandex
Highly stretchy to accommodate different body types
Machine wash cold, tumble dry low

Lounge Bralette Lc - Tencel™ Modal Gray Bandana

It’s our classic bra with a sporty racerback, and it’s here to support you. Made from the same quality supersoft cotton as our famous underwear. Double layered in the iconic Tomboy style, this zippy racerback bra offers the comfort of a bralette and full coverage so you won’t even notice you’re wearing it (what a relief).

Fit-tested on all body types, sizes XS-4X
Light support with no underwire or padding
Signature stay-put silky soft white chestband
95% OEKO-TEX Certified cotton, 5% spandex
Smooth, durable flatlock seams won’t irritate or chafe
Scoop-neck front, racer-style back
Machine wash cold, tumble dry low

Racerback Soft Bra Lc - Electric Pink

Our V-Neck Bralette is a new twist on an old favorite. Now with pockets for inserts and an updated fit to make sure you get all the support and comfort, with the same ruched center line and adjustable straps for definition and personalization. With our signature supersoft chest band and a full-coverage fit, you'll want one in every color.

Fit-tested on all body types, sizes XS-4X
Light support with no underwire or padding
Signature stay-put silky soft Rainbow chestband
95% OEKO-TEX Certified cotton, 5% spandex
Adjustable straps
Machine wash cold, tumble dry low

V Neck Bralette - Black Rainbow

Our V-Neck Bralette is a new twist on an old favorite. Now with pockets for inserts and an updated fit to make sure you get all the support and comfort, with the same ruched center line and adjustable straps for definition and personalization. With our signature supersoft chest band and a full-coverage fit, you'll want one in every color.

Fit-tested on all body types, sizes XS-4X
Light support with no underwire or padding
Signature stay-put silky soft X= White chestband
95% OEKO-TEX Certified cotton, 5% spandex
Adjustable straps
Machine wash cold, tumble dry low

V Neck Bralette - X= White

It’s our classic bra, and it’s here to support you. Made from the same quality supersoft cotton as our famous underwear. Double layered in the iconic Tomboy style, this bra offers the comfort of a bralette and full coverage so you won’t even notice you’re wearing it (what a relief).

Fit-tested on all body types, sizes XS-4X
Light support with no underwire or padding
Signature stay-put silky soft X= White chestband
95% OEKO-TEX Certified cotton, 5% spandex
Scoop-neck front and back
Machine wash cold, tumble dry low

Essentials Soft Bra Lc - Tropical Midnight

A bralette so soft we can’t seem to keep up with the demand. Made from the soft, sustainable TENCEL™ Modal, our popular bralette has a keyhole cutout in the front for definition, and our 1.5” silky chest band that won’t ever irritate or ride up no matter your cup size. We don’t see it as just a bra, more as a best friend.

Fit-tested on all body types, sizes XS-4X
Signature stay-put silky soft Rainbow TomboyX chestband
Sustainably sourced from renewable beechwood trees
Cross-back adjustable straps
Light support with no underwire or padding
95% TENCEL™ Modal, 5% spandex
Highly stretchy to accommodate different body types
Machine wash cold, tumble dry low

Mariama is 5’7” and wearing a size Medium Alana is 5’11” and wearing a size 2X

Lounge Bralette - Tencel™ Modal Black Rainbow

It’s our classic bra, and it’s here to support you. Made from the same quality supersoft cotton as our famous underwear. Double layered in the iconic Tomboy style, this bra offers the comfort of a bralette and full coverage so you won’t even notice you’re wearing it (what a relief).

Fit-tested on all body types, sizes XS-4X
Light support with no underwire or padding
Signature stay-put silky soft X= White chestband
95% OEKO-TEX Certified cotton, 5% spandex
Scoop-neck front and back
Machine wash cold, tumble dry low

Essentials Soft Bra Lc - Racer Stripes

It’s our classic bra with a sporty racerback, and it’s here to support you. Made from the same quality supersoft cotton as our famous underwear. Double layered in the iconic Tomboy style, this zippy racerback bra offers the comfort of a bralette and full coverage so you won’t even notice you’re wearing it (what a relief).

Fit-tested on all body types, sizes 3XS-6X
Light support with no underwire or padding
Signature stay-put silky soft X= Black chestband
95% OEKO-TEX Certified cotton, 5% spandex
Smooth, durable flatlock seams won’t irritate or chafe
Scoop-neck front, racer-style back
Machine wash cold, tumble dry low

Racerback Soft Bra - Progress Pride Stripes

Introducing an instant classic. Our new All Day Bralette features a lower neckline and racerback construction so it blends seamlessly under anything (even though it deserves to be seen). We’ve even added an extra layer of mesh lining for soft, all-day support. Featuring our trusty signature chestband that won’t pinch or ride up so you can throw it on and get moving.

Fit-tested on all body types XS - 4X
95% TENCEL™ Modal, 5% Spandex
Sustainably sourced from renewable beechwood trees
Signature stay-put silky soft Rainbow chestband
Medium support with no underwire or padding
Machine wash cold, tumble dry low

All Day Bralette - Tencel™ Modal Black Rainbow

It’s our classic bra with a sporty racerback, and it’s here to support you. Made from the same quality supersoft cotton as our famous underwear. Double layered in the iconic Tomboy style, this zippy racerback bra offers the comfort of a bralette and full coverage so you won’t even notice you’re wearing it (what a relief).

Fit-tested on all body types, sizes XS-4X
Light support with no underwire or padding
Signature stay-put silky soft X= White chestband
95% OEKO-TEX Certified cotton, 5% spandex
Smooth, durable flatlock seams won’t irritate or chafe
Scoop-neck front, racer-style back
Machine wash cold, tumble dry low

Racerback Soft Bra Lc - Racer Stripes

The darling of the TomboyX lineup, now with an improved look with added darts and removed seaming on the cups. Made of our luxurious, silky soft, breathable, and featherlight TENCEL™ Modal. The keyhole cutout in the front provides structure and separation and our signature 1.5" elastic chestband won’t irritate or ride up no matter your cup size.

Fit-tested on all body types, sizes XS-4X
Signature stay-put silky soft X= black chestband
Sustainably sourced from renewable beechwood trees
Cross-back adjustable straps
Light support with no underwire or padding
95% TENCEL™ Modal, 5% spandex
Highly stretchy to accommodate different body types
Machine wash cold, tumble dry low

Lounge Bralette - Tencel™ Modal Black

Our V-Neck Bralette is a new twist on an old favorite. Now with pockets for inserts and an updated fit to make sure you get all the support and comfort, with the same ruched center line and adjustable straps for definition and personalization. With our signature supersoft chest band and a full-coverage fit, you'll want one in every color.

Fit-tested on all body types, sizes XS-4X
Light support with no underwire or padding
Signature stay-put silky soft X= White chestband
95% OEKO-TEX Certified cotton, 5% spandex
Adjustable straps
Machine wash cold, tumble dry low

Mariama is 5’7” and wearing a size Medium

V Neck Bralette - Rainbow Pride Stripes

It’s our classic bra with a sporty racerback, and it’s here to support you. Made from the same quality supersoft cotton as our famous underwear. Double layered in the iconic Tomboy style, this zippy racerback bra offers the comfort of a bralette and full coverage so you won’t even notice you’re wearing it (what a relief).

Fit-tested on all body types, sizes 3XS-6X
Light support with no underwire or padding
Signature stay-put silky soft X= White chestband
95% OEKO-TEX Certified cotton, 5% spandex
Smooth, durable flatlock seams won’t irritate or chafe
Scoop-neck front, racer-style back
Machine wash cold, tumble dry low

Racerback Soft Bra Lc - Tropical Midnight

Racerback Soft Bra Lc - Island Blue

A bralette that lifts and separates while being as soft as a cloud? Sign us up. The same supersoft cotton blend you love, with a ruched center line to help with definition. Adjustable straps let you get the perfect fit, and our silky chestband keeps everything in place so you stay comfy and supported in a full coverage bralette that you’ll want in every color.

Fit-tested on all body types, sizes XS-4X
Light support with no underwire or padding
Signature stay-put silky soft X= White chestband
95% OEKO-TEX Certified cotton, 5% spandex
Adjustable straps
Machine wash cold, tumble dry low

Ruched Bralette Lc - Racer Stripes

Our V-Neck Bralette is a new twist on an old favorite. Now with pockets for inserts and an updated fit to make sure you get all the support and comfort, with the same ruched center line and adjustable straps for definition and personalization. With our signature supersoft chest band and a full-coverage fit, you'll want one in every color.

Fit-tested on all body types, sizes XS-4X
Light support with no underwire or padding
Signature stay-put silky soft X= Black chestband
95% OEKO-TEX Certified cotton, 5% spandex
Adjustable straps
Machine wash cold, tumble dry low

V Neck Bralette - Progress Pride Stripes

It’s our classic bra, and it’s here to support you. Made from the same quality supersoft cotton as our famous underwear. Double layered in the iconic Tomboy style, this bra offers the comfort of a bralette and full coverage so you won’t even notice you’re wearing it (what a relief).

Fit-tested on all body types, sizes XS-4X
Light support with no underwire or padding
Signature stay-put silky soft white chestband
95% OEKO-TEX Certified cotton, 5% spandex
Scoop-neck front and back
Machine wash cold, tumble dry low