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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.

6,108 items
Mini Boden Size 6 mo
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View Product: Mini Boden Size 6 mo

Mini Boden

Size 6 mo
$12.99 $50

$6.49 50% off with

Adidas Size 8
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View Product: Adidas Size 8

Adidas

Size 8
$12.99 $38

$6.49 50% off with

Assorted Brands Size 10
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View Product: Assorted Brands Size 10

Assorted Brands

Size 10
$8.99 $31

$5.39 40% off with

ZeroXposur Size 10
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View Product: ZeroXposur Size 10

ZeroXposur

Size 10
$7.99 $38

$4.79 40% off with

Nike Size Small kids
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View Product: Nike Size Small kids

Nike

Size Small kids
$7.99 $32

$4.79 40% off with

Fila Sport Size Medium youth
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View Product: Fila Sport Size Medium youth

Fila Sport

Size Medium youth
$7.99 $38

$4.79 40% off with

Fila Sport Size 8
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View Product: Fila Sport Size 8

Fila Sport

Size 8
$7.99 $38

$4.79 40% off with

Tek Gear Size Small youth
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View Product: Tek Gear Size Small youth

Tek Gear

Size Small youth
$7.99 $23

$4.79 40% off with

Nike Size 12 mo
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View Product: Nike Size 12 mo

Nike

Size 12 mo
$7.99 $34

$4.79 40% off with

Baby Gap Size 12-18 mo
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View Product: Baby Gap Size 12-18 mo

Baby Gap

Size 12-18 mo
$7.99 $30

$4.79 40% off with

Lands' End Size 8
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View Product: Lands' End Size 8

Lands' End

Size 8
$7.99 $31

$4.79 40% off with

Rockets of Awesome Size 8
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View Product: Rockets of Awesome Size 8

Rockets of Awesome

Size 8
$7.99 $31

$4.79 40% off with

The Children's Place Size 5
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View Product: The Children's Place Size 5

The Children's Place

Size 5
$7.99 $30

$4.79 40% off with

Under Armour Size Medium youth
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View Product: Under Armour Size Medium youth

Under Armour

Size Medium youth
$11.99 $38

$7.19 40% off with

Carter's Size 24 mo
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View Product: Carter's Size 24 mo

Carter's

Size 24 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
Carter's Size 9 mo
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View Product: Carter's Size 9 mo

Carter's

Size 9 mo
$5.99 $20
Polo by Ralph Lauren Size 12 mo
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View Product: Polo by Ralph Lauren Size 12 mo

Polo by Ralph Lauren

Size 12 mo
$7.99 $50

$6.39 20% off with

Unbranded Size 12 mo
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View Product: Unbranded Size 12 mo

Unbranded

Size 12 mo
$6.99 $20
Ralph Lauren Size 9 mo
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View Product: Ralph Lauren Size 9 mo

Ralph Lauren

Size 9 mo
$7.99 $30

$6.39 20% off with

Assorted Brands Size 4T
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View Product: Assorted Brands Size 4T

Assorted Brands

Size 4T
$6.99 $34
Carter's Size 24 mo
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View Product: Carter's Size 24 mo

Carter's

Size 24 mo
$7.99 $27

$6.39 20% off with

PLACE Sport Size 5
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View Product: PLACE Sport Size 5

PLACE Sport

Size 5
$6.99 $11
Jumping Beans Size 4T
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View Product: Jumping Beans Size 4T

Jumping Beans

Size 4T
$6.99 $16
C9 By Champion Size 6
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View Product: C9 By Champion Size 6

C9 By Champion

Size 6
$6.99 $15
Gymboree Size 18-24 mo
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View Product: Gymboree Size 18-24 mo

Gymboree

Size 18-24 mo
$5.99 $20
Puma Size 6-9 mo
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View Product: Puma Size 6-9 mo

Puma

Size 6-9 mo
$5.99 $20
Joe Boxer Size 8
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View Product: Joe Boxer Size 8

Joe Boxer

Size 8
$5.99 $20
C9 By Champion Size 8
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View Product: C9 By Champion Size 8

C9 By Champion

Size 8
$5.99 $15
Old Navy Size 3-6 mo
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View Product: Old Navy Size 3-6 mo

Old Navy

Size 3-6 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
Gap Kids Size 8
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View Product: Gap Kids Size 8

Gap Kids

Size 8
$7.99 $40

$6.39 20% off with

Gap Kids Size 8
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View Product: Gap Kids Size 8

Gap Kids

Size 8
$5.99 $20
Old Navy Size 6-12 mo
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View Product: Old Navy Size 6-12 mo

Old Navy

Size 6-12 mo
$5.99 $20
Team Athletics Size 10
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View Product: Team Athletics Size 10

Team Athletics

Size 10
$5.99 $15
Sport-Tek by Port Authority Size Medium kids
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View Product: Sport-Tek by Port Authority Size Medium kids

Sport-Tek by Port Authority

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

Carter's

Size 18 mo
$5.99 $20
C9 By Champion Size Medium kids
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View Product: C9 By Champion Size Medium kids

C9 By Champion

Size Medium kids
$6.99 $15
Augusta Sportswear Size Medium youth
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View Product: Augusta Sportswear Size Medium youth

Augusta Sportswear

Size Medium youth
$5.99 $23
Carter's Size 24 mo
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View Product: Carter's Size 24 mo

Carter's

Size 24 mo
$5.99 $20
Athletic Works Size 10
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View Product: Athletic Works Size 10

Athletic Works

Size 10
$6.99 $15
C9 By Champion Size Large kids
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View Product: C9 By Champion Size Large kids

C9 By Champion

Size Large kids
$5.99 $15
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 3 mo
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View Product: Carter's Size 3 mo

Carter's

Size 3 mo
$5.99 $27
Russell Athletic Size Small youth
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View Product: Russell Athletic Size Small youth

Russell Athletic

Size Small youth
$5.99 $15
Nike Size 4
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View Product: Nike Size 4

Nike

Size 4
$5.99 $26
Carter's Size 18 mo
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View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$6.99 $20
Gymboree Size 6-12 mo
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View Product: Gymboree Size 6-12 mo

Gymboree

Size 6-12 mo
$6.99 $27
Carter's Size 18 mo
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View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$6.99 $28