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Boys' Swimwear

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Whether it's a day at the pool or the beach, your little man needs a comfortable and stylish look. At thredUP, you'll find boys' swimwear in a variety of styles, colors, and designs that he will love, and at up to 90% off estimated retail, the prices will make you happy as well.

2,986 items
Carter's Size 18 mo
Carter's Size 18 mo

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$9.99 $28

$5.99 40% off with

Hanna Andersson Size 70 cm
Hanna Andersson Size 70 cm

View Product: Hanna Andersson Size 70 cm

Hanna Andersson

Size 70 cm
$11.99 $28

$7.19 40% off with

Gymboree Size 6-12 mo
Gymboree Size 6-12 mo

View Product: Gymboree Size 6-12 mo

Gymboree

Size 6-12 mo
$9.99 $25

$5.99 40% off with

Park Bench Kids Size 2T
Park Bench Kids Size 2T

View Product: Park Bench Kids Size 2T

Park Bench Kids

Size 2T
$4.99 $10
First Wave Size 6
First Wave Size 6

View Product: First Wave Size 6

First Wave

Size 6
$6.99 $10
Cat & Jack Size 3T
Cat & Jack Size 3T

View Product: Cat & Jack Size 3T

Cat & Jack

Size 3T
$5.99 $13
Old Navy Size 6-12 mo
Old Navy Size 6-12 mo

View Product: Old Navy Size 6-12 mo

Old Navy

Size 6-12 mo
$5.99 $13
Unbranded Size 3T
Unbranded Size 3T

View Product: Unbranded Size 3T

Unbranded

Size 3T
$5.99 $17
Old Navy Size 5
Old Navy Size 5

View Product: Old Navy Size 5

Old Navy

Size 5
$5.99 $15
Old Navy Size 5
Old Navy Size 5

View Product: Old Navy Size 5

Old Navy

Size 5
$5.99 $15
Baby Gap Size 2T
Baby Gap Size 2T

View Product: Baby Gap Size 2T

Baby Gap

Size 2T
$7.99 $20

$6.39 20% off with

Cat & Jack Size 16
Cat & Jack Size 16

View Product: Cat & Jack Size 16

Cat & Jack

Size 16
$7.99 $15

$6.39 20% off with

Star Wars Size 6
Star Wars Size 6
New With Tags BadgeNew With Tags

View Product: Star Wars Size 6

Star Wars

Size 6
$5.99 $12.99
Carter's Size 4T
Carter's Size 4T

View Product: Carter's Size 4T

Carter's

Size 4T
$7.99 $24

$6.39 20% off with

Cherokee Size 4
Cherokee Size 4

View Product: Cherokee Size 4

Cherokee

Size 4
$5.99 $13
Gymboree Size 6
Gymboree Size 6

View Product: Gymboree Size 6

Gymboree

Size 6
$9.99 $25

$7.99 20% off with

Mick Mack Ltd Size 4T
Mick Mack Ltd Size 4T

View Product: Mick Mack Ltd Size 4T

Mick Mack Ltd

Size 4T
$7.99 $26

$6.39 20% off with

The Children's Place Size 12 mo
The Children's Place Size 12 mo

View Product: The Children's Place Size 12 mo

The Children's Place

Size 12 mo
$4.99 $15
Old Navy Size 5T
Old Navy Size 5T

View Product: Old Navy Size 5T

Old Navy

Size 5T
$5.99 $15
Star Wars Size 5T
Star Wars Size 5T

View Product: Star Wars Size 5T

Star Wars

Size 5T
$5.99 $9
Op Size 10
Op Size 10

View Product: Op Size 10

Op

Size 10
$4.99 $10
OshKosh B'gosh Size 5T
OshKosh B'gosh Size 5T

View Product: OshKosh B'gosh Size 5T

OshKosh B'gosh

Size 5T
$6.99 $20
Old Navy Size 5
Old Navy Size 5

View Product: Old Navy Size 5

Old Navy

Size 5
$5.99 $15
Carter's Size 4T
Carter's Size 4T

View Product: Carter's Size 4T

Carter's

Size 4T
$7.99 $24

$6.39 20% off with

Mick Mack Ltd Size 4T
Mick Mack Ltd Size 4T

View Product: Mick Mack Ltd Size 4T

Mick Mack Ltd

Size 4T
$6.99 $17
Crazy 8 Size 5
Crazy 8 Size 5

View Product: Crazy 8 Size 5

Crazy 8

Size 5
$7.99 $17

$6.39 20% off with

Carter's Size 4T
Carter's Size 4T

View Product: Carter's Size 4T

Carter's

Size 4T
$8.99 $24

$7.19 20% off with

Carter's Size 24 mo
Carter's Size 24 mo

View Product: Carter's Size 24 mo

Carter's

Size 24 mo
$7.99 $24

$6.39 20% off with

Carter's Size 4T
Carter's Size 4T

View Product: Carter's Size 4T

Carter's

Size 4T
$7.99 $24

$6.39 20% off with

Hawaiian Islands Size 5
Hawaiian Islands Size 5

View Product: Hawaiian Islands Size 5

Hawaiian Islands

Size 5
$4.99 $9
Laguna Size 3T
Laguna Size 3T

View Product: Laguna Size 3T

Laguna

Size 3T
$6.99 $13
Carter's Size 2T
Carter's Size 2T

View Product: Carter's Size 2T

Carter's

Size 2T
$7.99 $24

$6.39 20% off with

Carter's Size 24 mo
Carter's Size 24 mo

View Product: Carter's Size 24 mo

Carter's

Size 24 mo
$7.99 $24

$6.39 20% off with

Volcom Size 5
Volcom Size 5

View Product: Volcom Size 5

Volcom

Size 5
$6.99 $21
Cat & Jack Size 6
Cat & Jack Size 6

View Product: Cat & Jack Size 6

Cat & Jack

Size 6
$4.99 $10
Carter's Size 3T
Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$8.99 $24

$7.19 20% off with

Gymboree Size 4
Gymboree Size 4

View Product: Gymboree Size 4

Gymboree

Size 4
$9.99 $25

$7.99 20% off with

Carter's Size 3T
Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$8.99 $24

$7.19 20% off with

Gap Kids Size 8
Gap Kids Size 8

View Product: Gap Kids Size 8

Gap Kids

Size 8
$10.99 $30

$8.79 20% off with

Carter's Size 18 mo
Carter's Size 18 mo

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$8.99 $24

$7.19 20% off with

Cat & Jack Size 3T
Cat & Jack Size 3T

View Product: Cat & Jack Size 3T

Cat & Jack

Size 3T
$6.99 $13
Nickelodeon Size 4
Nickelodeon Size 4

View Product: Nickelodeon Size 4

Nickelodeon

Size 4
$6.99 $13
Spiderman Size 10
Spiderman Size 10
New With Tags BadgeNew With Tags

View Product: Spiderman Size 10

Spiderman

Size 10
$6.99 $11.76
The Children's Place Size 3T
The Children's Place Size 3T

View Product: The Children's Place Size 3T

The Children's Place

Size 3T
$6.99 $19
Marvel Size X-Small  kids
Marvel Size X-Small  kids

View Product: Marvel Size X-Small kids

Marvel

Size X-Small kids
$9.99 $17

$7.99 20% off with

Carter's Size 3T
Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$11.99 $28

$9.59 20% off with

Hatley Size 2
Hatley Size 2

View Product: Hatley Size 2

Hatley

Size 2
$4.99 $17
Carter's Size 3T
Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$8.99 $24

$7.19 20% off with

Leveret Size 3T
Leveret Size 3T

View Product: Leveret Size 3T

Leveret

Size 3T
$9.99 $32

$6.99 30% off with

Mossimo Supply Co. Size 12
Mossimo Supply Co. Size 12

View Product: Mossimo Supply Co. Size 12

Mossimo Supply Co.

Size 12
$4.99 $10
Baby Gap Size 18-24 mo
Baby Gap Size 18-24 mo

View Product: Baby Gap Size 18-24 mo

Baby Gap

Size 18-24 mo
$6.99 $20
Billabong Size 10
Billabong Size 10

View Product: Billabong Size 10

Billabong

Size 10
$9.99 $26

$7.99 20% off with

Janie and Jack Size 2T
Janie and Jack Size 2T

View Product: Janie and Jack Size 2T

Janie and Jack

Size 2T
$5.99 $17
Lands' End Size 10
Lands' End Size 10

View Product: Lands' End Size 10

Lands' End

Size 10
$6.99 $20
Mossimo Supply Co. Size 8
Mossimo Supply Co. Size 8

View Product: Mossimo Supply Co. Size 8

Mossimo Supply Co.

Size 8
$4.99 $10
Lands' End Size 4T
Lands' End Size 4T

View Product: Lands' End Size 4T

Lands' End

Size 4T
$7.99 $25

$6.39 20% off with

Gap Kids Size 8
Gap Kids Size 8

View Product: Gap Kids Size 8

Gap Kids

Size 8
$9.99 $30

$7.99 20% off with

Gymboree Size 3-6 mo
Gymboree Size 3-6 mo

View Product: Gymboree Size 3-6 mo

Gymboree

Size 3-6 mo
$8.99 $25

$7.19 20% off with

Sovereign Code Size 12 mo
Sovereign Code Size 12 mo

View Product: Sovereign Code Size 12 mo

Sovereign Code

Size 12 mo
$4.99 $10
Crazy 8 Size 3T
Crazy 8 Size 3T

View Product: Crazy 8 Size 3T

Crazy 8

Size 3T
$6.99 $17
Carter's Size 3T
Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$8.99 $24

$7.19 20% off with

Janie and Jack Size 2T
Janie and Jack Size 2T

View Product: Janie and Jack Size 2T

Janie and Jack

Size 2T
$8.99 $29

$7.19 20% off with

O'Neill Size 14
O'Neill Size 14

View Product: O'Neill Size 14

O'Neill

Size 14
$13.99 $31

$11.19 20% off with

Cat & Jack Size 3T
Cat & Jack Size 3T

View Product: Cat & Jack Size 3T

Cat & Jack

Size 3T
$4.99 $9
Cat & Jack Size Large youth
Cat & Jack Size Large youth

View Product: Cat & Jack Size Large youth

Cat & Jack

Size Large youth
$8.99 $15

$7.19 20% off with

Baby Gap Size 3T
Baby Gap Size 3T

View Product: Baby Gap Size 3T

Baby Gap

Size 3T
$7.99 $20

$6.39 20% off with

Marvel Size 5T
Marvel Size 5T

View Product: Marvel Size 5T

Marvel

Size 5T
$6.99 $17
Cat & Jack Size 8
Cat & Jack Size 8

View Product: Cat & Jack Size 8

Cat & Jack

Size 8
$4.99 $10
Revolution Size 10
Revolution Size 10

View Product: Revolution Size 10

Revolution

Size 10
$4.99 $10
Art Class Size 12
Art Class Size 12

View Product: Art Class Size 12

Art Class

Size 12
$6.99 $13
Carter's Size 24 mo
Carter's Size 24 mo

View Product: Carter's Size 24 mo

Carter's

Size 24 mo
$8.99 $24

$7.19 20% off with

Circo Size 5T
Circo Size 5T

View Product: Circo Size 5T

Circo

Size 5T
$7.99 $13

$6.39 20% off with

Circo Size 5T
Circo Size 5T

View Product: Circo Size 5T

Circo

Size 5T
$6.99 $13
Wonder Nation Size 10
Wonder Nation Size 10

View Product: Wonder Nation Size 10

Wonder Nation

Size 10
$4.99 $10
PJ MASKS Size 2T
PJ MASKS Size 2T

View Product: PJ MASKS Size 2T

PJ MASKS

Size 2T
$6.99 $13
Janie and Jack Size 12-18 mo
Janie and Jack Size 12-18 mo

View Product: Janie and Jack Size 12-18 mo

Janie and Jack

Size 12-18 mo
$9.99 $29

$7.99 20% off with

UV Skinz Size 3T
UV Skinz Size 3T
New With Tags BadgeNew With Tags

View Product: UV Skinz Size 3T

UV Skinz

Size 3T
$11.99 $32

$9.59 20% off with

Mini Boden Size 2
Mini Boden Size 2

View Product: Mini Boden Size 2

Mini Boden

Size 2
$8.99 $17

$7.19 20% off with

Baby Gap Size 3
Baby Gap Size 3

View Product: Baby Gap Size 3

Baby Gap

Size 3
$9.99 $20

$7.99 20% off with

Cat & Jack Size 6
Cat & Jack Size 6

View Product: Cat & Jack Size 6

Cat & Jack

Size 6
$10.99 $15

$8.79 20% off with

Mick Mack Ltd Size 3T
Mick Mack Ltd Size 3T

View Product: Mick Mack Ltd Size 3T

Mick Mack Ltd

Size 3T
$6.99 $17
Old Navy Size 6
Old Navy Size 6

View Product: Old Navy Size 6

Old Navy

Size 6
$10.99 $25

$8.79 20% off with

Batman Size Small kids
Batman Size Small kids

View Product: Batman Size Small kids

Batman

Size Small kids
$8.99 $13

$7.19 20% off with

Earth Nymph Size 12-24 mo
Earth Nymph Size 12-24 mo

View Product: Earth Nymph Size 12-24 mo

Earth Nymph

Size 12-24 mo
$6.99 $15
Old Navy Size 12-18 mo
Old Navy Size 12-18 mo

View Product: Old Navy Size 12-18 mo

Old Navy

Size 12-18 mo
$6.99 $15
Carter's Size 6
Carter's Size 6

View Product: Carter's Size 6

Carter's

Size 6
$10.99 $28

$8.79 20% off with

Old Navy Size 10
Old Navy Size 10

View Product: Old Navy Size 10

Old Navy

Size 10
$11.99 $25

$9.59 20% off with

UV Skinz Size 4T
UV Skinz Size 4T

View Product: UV Skinz Size 4T

UV Skinz

Size 4T
$7.99 $21

$6.39 20% off with

Cherokee Size Medium youth
Cherokee Size Medium youth

View Product: Cherokee Size Medium youth

Cherokee

Size Medium youth
$6.99 $13
Speedo Size Medium kids
Speedo Size Medium kids

View Product: Speedo Size Medium kids

Speedo

Size Medium kids
$7.99 $15

$6.39 20% off with

Cat & Jack Size 4T
Cat & Jack Size 4T

View Product: Cat & Jack Size 4T

Cat & Jack

Size 4T
$9.99 $20

$7.99 20% off with

Lands' End Size 17
Lands' End Size 17

View Product: Lands' End Size 17

Lands' End

Size 17
$14.99 $25

$11.99 20% off with

Cat & Jack Size 3T
Cat & Jack Size 3T

View Product: Cat & Jack Size 3T

Cat & Jack

Size 3T
$5.99 $9
Baby Buns Size 9 mo
Baby Buns Size 9 mo

View Product: Baby Buns Size 9 mo

Baby Buns

Size 9 mo
$5.99 $14
Carter's Size 12 mo
Carter's Size 12 mo

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$8.99 $24

$7.19 20% off with

Carter's Size 12 mo
Carter's Size 12 mo

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$9.99 $28

$7.99 20% off with

Wonder Nation Size X-Large youth
Wonder Nation Size X-Large youth

View Product: Wonder Nation Size X-Large youth

Wonder Nation

Size X-Large youth
$6.99 $10
Assorted Brands Size 20
Assorted Brands Size 20

View Product: Assorted Brands Size 20

Assorted Brands

Size 20
$9.99 $20

$6.99 30% off with

Lands' End Size 3T
Lands' End Size 3T

View Product: Lands' End Size 3T

Lands' End

Size 3T
$11.99 $25

$8.39 30% off with

Old Navy Size 3T
Old Navy Size 3T

View Product: Old Navy Size 3T

Old Navy

Size 3T
$5.99 $15
OshKosh B'gosh Size 3T
OshKosh B'gosh Size 3T

View Product: OshKosh B'gosh Size 3T

OshKosh B'gosh

Size 3T
$6.99 $20
Wonder Nation Size Small youth
Wonder Nation Size Small youth

View Product: Wonder Nation Size Small youth

Wonder Nation

Size Small youth
$4.99 $10
Plugg Size Medium youth
Plugg Size Medium youth

View Product: Plugg Size Medium youth

Plugg

Size Medium youth
$4.99 $10
Zara Size 3
Zara Size 3

View Product: Zara Size 3

Zara

Size 3
$11.99 $32

$9.59 20% off with

Carter's Size 3T
Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$7.99 $24

$6.39 20% off with

Plugg Size Medium youth
Plugg Size Medium youth

View Product: Plugg Size Medium youth

Plugg

Size Medium youth
$4.99 $10
Plugg Size Medium youth
Plugg Size Medium youth

View Product: Plugg Size Medium youth

Plugg

Size Medium youth
$4.99 $10
TCM Size Medium youth
TCM Size Medium youth

View Product: TCM Size Medium youth

TCM

Size Medium youth
$4.99 $10
Old Navy Size 6
Old Navy Size 6

View Product: Old Navy Size 6

Old Navy

Size 6
$10.99 $25

$8.79 20% off with

Sun N Sand Size 12
Sun N Sand Size 12

View Product: Sun N Sand Size 12

Sun N Sand

Size 12
$5.99 $10
Unbranded Size 3T
Unbranded Size 3T

View Product: Unbranded Size 3T

Unbranded

Size 3T
$6.99 $17
Op Size 10
Op Size 10

View Product: Op Size 10

Op

Size 10
$6.99 $10
Old Navy Size 2T
Old Navy Size 2T

View Product: Old Navy Size 2T

Old Navy

Size 2T
$8.99 $15

$7.19 20% off with

Crewcuts Size 12
Crewcuts Size 12

View Product: Crewcuts Size 12

Crewcuts

Size 12
$7.99 $31

$6.39 20% off with

Carter's Size 12 mo
Carter's Size 12 mo

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$7.99 $24

$6.39 20% off with

Wonder Nation Size 6
Wonder Nation Size 6

View Product: Wonder Nation Size 6

Wonder Nation

Size 6
$6.99 $15
OshKosh B'gosh Size 12 mo
OshKosh B'gosh Size 12 mo

View Product: OshKosh B'gosh Size 12 mo

OshKosh B'gosh

Size 12 mo
$6.99 $21
Carter's Size 12 mo
Carter's Size 12 mo

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$8.99 $28

$7.19 20% off with

Carter's Size 12 mo
Carter's Size 12 mo

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$7.99 $24

$6.39 20% off with

Cat & Jack Size 12
Cat & Jack Size 12

View Product: Cat & Jack Size 12

Cat & Jack

Size 12
$8.99 $15

$7.19 20% off with

...