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Boys' Activewear

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Cater to your boys' busy lifestyles with affordable activewear from thredUP. Enjoy steep savings with prices up to 90% off estimated retail when you shop our extensive collection of hoodies, tops, shorts, and pants.

6,120 items
Carter's Size 2T
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View Product: Carter's Size 2T

Carter's

Size 2T
$8.99 $28

$6.29 30% off with

Assorted Brands Size Small kids
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View Product: Assorted Brands Size Small kids

Assorted Brands

Size Small kids
$5.99 $34
Lands' End Size 4
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View Product: Lands' End Size 4

Lands' End

Size 4
$5.99 $39
Carter's Size 9 mo
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View Product: Carter's Size 9 mo

Carter's

Size 9 mo
$5.99 $20
OshKosh B'gosh Size 8
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View Product: OshKosh B'gosh Size 8

OshKosh B'gosh

Size 8
$6.99 $41
Carter's Size 3 mo
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View Product: Carter's Size 3 mo

Carter's

Size 3 mo
$5.99 $20
Carter's Size 12 mo
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View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$5.99 $20
Carter's Size 12 mo
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View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$5.99 $20
OshKosh B'gosh Size 5
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View Product: OshKosh B'gosh Size 5

OshKosh B'gosh

Size 5
$6.99 $26
Colosseum Athletics Size 4T
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View Product: Colosseum Athletics Size 4T

Colosseum Athletics

Size 4T
$6.99 $26
Carter's Size 6 mo
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View Product: Carter's Size 6 mo

Carter's

Size 6 mo
$5.99 $27
Majestic Size 12 mo
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View Product: Majestic Size 12 mo

Majestic

Size 12 mo
$5.99 $20
Carter's Size 9 mo
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View Product: Carter's Size 9 mo

Carter's

Size 9 mo
$5.99 $20
Unbranded Size 6-9 mo
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View Product: Unbranded Size 6-9 mo

Unbranded

Size 6-9 mo
$5.99 $20
Ralph Lauren Baby Size 9 mo
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View Product: Ralph Lauren Baby Size 9 mo

Ralph Lauren Baby

Size 9 mo
$5.99 $31
Carter's Size 2T
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View Product: Carter's Size 2T

Carter's

Size 2T
$5.99 $20
Colosseum Athletics Size 8
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View Product: Colosseum Athletics Size 8

Colosseum Athletics

Size 8
$8.99 $31

$6.29 30% off with

Carter's Size 6 mo
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View Product: Carter's Size 6 mo

Carter's

Size 6 mo
$5.99 $20
Carter's Size 3 mo
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View Product: Carter's Size 3 mo

Carter's

Size 3 mo
$5.99 $20
Nike Size Small youth
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View Product: Nike Size Small youth

Nike

Size Small youth
$6.99 $38
Assorted Brands Size 8
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View Product: Assorted Brands Size 8

Assorted Brands

Size 8
$5.99 $20
First Impressions Size 18 mo
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View Product: First Impressions Size 18 mo

First Impressions

Size 18 mo
$5.99 $26
Assorted Brands Size 3T
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View Product: Assorted Brands Size 3T

Assorted Brands

Size 3T
$5.99 $26
Carter's Size 9 mo
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View Product: Carter's Size 9 mo

Carter's

Size 9 mo
$5.99 $20
Gymboree Size 18-24 mo
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View Product: Gymboree Size 18-24 mo

Gymboree

Size 18-24 mo
$5.99 $20
Assorted Brands Size 8
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View Product: Assorted Brands Size 8

Assorted Brands

Size 8
$5.99 $31
H&M Size 6
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View Product: H&M Size 6

H&M

Size 6
$5.99 $23
Nike Size 12 mo
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View Product: Nike Size 12 mo

Nike

Size 12 mo
$5.99 $26
Adidas Size Small youth
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View Product: Adidas Size Small youth

Adidas

Size Small youth
$6.99 $26
Carter's Size 9 mo
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View Product: Carter's Size 9 mo

Carter's

Size 9 mo
$5.99 $20
Carter's Size 3 mo
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View Product: Carter's Size 3 mo

Carter's

Size 3 mo
$5.99 $27
Baby Gap Size 12-18 mo
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View Product: Baby Gap Size 12-18 mo

Baby Gap

Size 12-18 mo
$5.99 $30
New Balance Size 8
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View Product: New Balance Size 8

New Balance

Size 8
$5.99 $46
Baby Gap Size 12-18 mo
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View Product: Baby Gap Size 12-18 mo

Baby Gap

Size 12-18 mo
$5.99 $30
U.S. Polo Assn. Size 18 mo
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View Product: U.S. Polo Assn. Size 18 mo

U.S. Polo Assn.

Size 18 mo
$5.99 $15
Carter's Size 18 mo
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View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$5.99 $27
Jumping Beans Size 4
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View Product: Jumping Beans Size 4

Jumping Beans

Size 4
$6.99 $16
Carter's Size 3T
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View Product: Carter's Size 3T

Carter's

Size 3T
$5.99 $26
Wonder Nation Size 8
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View Product: Wonder Nation Size 8

Wonder Nation

Size 8
$5.99 $20
Carter's Size 12 mo
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View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$5.99 $20
Carter's Size 9 mo
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View Product: Carter's Size 9 mo

Carter's

Size 9 mo
$5.99 $27
Carter's Size 9 mo
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View Product: Carter's Size 9 mo

Carter's

Size 9 mo
$7.99 $12

$6.39 20% off with

Castelbajac Sport Size 140 cm
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View Product: Castelbajac Sport Size 140 cm

Castelbajac Sport

Size 140 cm
$8.99 $77

$6.29 30% off with

Assorted Brands Size Medium youth
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View Product: Assorted Brands Size Medium youth

Assorted Brands

Size Medium youth
$6.99 $31
Marvel Size 7
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View Product: Marvel Size 7

Marvel

Size 7
$8.99 $20

$6.29 30% off with

Old Navy Size 6-12 mo
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View Product: Old Navy Size 6-12 mo

Old Navy

Size 6-12 mo
$7.99 $20

$6.39 20% off with

Puma Size 6
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View Product: Puma Size 6

Puma

Size 6
$6.99 $31
Baby Gap Size 6-12 mo
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View Product: Baby Gap Size 6-12 mo

Baby Gap

Size 6-12 mo
$6.99 $18
Disneyland Resort Size Small youth
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View Product: Disneyland Resort Size Small youth

Disneyland Resort

Size Small youth
$7.99 $41

$6.39 20% off with

Carter's Size 6 mo
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View Product: Carter's Size 6 mo

Carter's

Size 6 mo
$5.99 $27