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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.

5,129 items
Filtering byBoys: activewear
Heat Gear by Under Armour Size Small youth
Price Drop
View Product: Heat Gear by Under Armour Size Small youth

Heat Gear by Under Armour

Size Small youth
$11.99 $31

$8.39 30% off with

Abercrombie Size 9
Price Drop
View Product: Abercrombie Size 9

Abercrombie

Size 9
$8.99 $40

$6.29 30% off with

Bit'z Kids Size 4
Price Drop
View Product: Bit'z Kids Size 4

Bit'z Kids

Size 4
$8.99 $19

$6.29 30% off with

Stadium Athletics Size 3T
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View Product: Stadium Athletics Size 3T

Stadium Athletics

Size 3T
$11.99 $21

$8.39 30% off with

Tea Size 6
Price Drop
View Product: Tea Size 6

Tea

Size 6
$22.99 $49

$16.09 30% off with

Gap Fit Size X-Large kids
Price Drop
View Product: Gap Fit Size X-Large kids

Gap Fit

Size X-Large kids
$16.99 $38

$10.19 40% off with

OshKosh B'gosh Size 4
Price Drop
View Product: OshKosh B'gosh Size 4

OshKosh B'gosh

Size 4
$8.99 $26

$5.39 40% off with

OshKosh B'gosh Size 24 mo
Price Drop
View Product: OshKosh B'gosh Size 24 mo

OshKosh B'gosh

Size 24 mo
$7.99 $22

$4.79 40% off with

Gap Kids Size 8
Price Drop
View Product: Gap Kids Size 8

Gap Kids

Size 8
$8.99 $40

$5.39 40% off with

Rockets of Awesome Size 10
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View Product: Rockets of Awesome Size 10

Rockets of Awesome

Size 10
$11.99 $41

$7.19 40% off with

Heat Gear by Under Armour Size X-Large youth
Price Drop
View Product: Heat Gear by Under Armour Size X-Large youth

Heat Gear by Under Armour

Size X-Large youth
$14.99 $31

$10.49 30% off with

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

Carter's

Size 6
$9.99 $31

$6.99 30% off with

The Children's Place Size 7
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View Product: The Children's Place Size 7

The Children's Place

Size 7
$8.99 $18

$6.29 30% off with

OshKosh B'gosh Size 18-24 mo
Price Drop
View Product: OshKosh B'gosh Size 18-24 mo

OshKosh B'gosh

Size 18-24 mo
$8.99 $22

$6.29 30% off with

By Kids Only.com Size 7
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View Product: By Kids Only.com Size 7

By Kids Only.com

Size 7
$11.99 $51

$8.39 30% off with

The Children's Place Size 3T
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View Product: The Children's Place Size 3T

The Children's Place

Size 3T
$8.99 $18

$6.29 30% off with

IXIX Clothing Size 4T
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View Product: IXIX Clothing Size 4T

IXIX Clothing

Size 4T
$8.99 $26

$6.29 30% off with

Under Armour Size Large youth
Price Drop
View Product: Under Armour Size Large youth

Under Armour

Size Large youth
$17.99 $38

$10.79 40% off with

Nike Size 6
Price Drop
View Product: Nike Size 6

Nike

Size 6
$17.99 $38

$12.59 30% off with

Carter's Size Newborn
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View Product: Carter's Size Newborn

Carter's

Size Newborn
$4.99 $20

$3.49 30% off with

American Apparel Size 12-18 mo
Price Drop
View Product: American Apparel Size 12-18 mo

American Apparel

Size 12-18 mo
$4.99 $20

$3.49 30% off with

American Apparel Size 12-18 mo
Price Drop
View Product: American Apparel Size 12-18 mo

American Apparel

Size 12-18 mo
$4.99 $20

$3.49 30% off with

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

Baby Gap

Size 12-18 mo
$4.99 $18

$3.49 30% off with

Danskin Now Size 10
Price Drop
View Product: Danskin Now Size 10

Danskin Now

Size 10
$4.99 $15

$2.99 40% off with

Koala Baby Size Newborn
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View Product: Koala Baby Size Newborn

Koala Baby

Size Newborn
$4.99 $10

$3.99 20% off with

High Five Size Small youth
Price Drop
View Product: High Five Size Small youth

High Five

Size Small youth
$4.99 $20

$3.49 30% off with

Carter's Size 0-3 mo
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View Product: Carter's Size 0-3 mo

Carter's

Size 0-3 mo
$4.99 $20

$3.49 30% off with

Old Navy Size 14
Price Drop
View Product: Old Navy Size 14

Old Navy

Size 14
$4.99 $17

$3.49 30% off with

Hatley Size 2
Price Drop
View Product: Hatley Size 2

Hatley

Size 2
$4.99 $34

$3.99 20% off with

Assorted Brands Size 8
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View Product: Assorted Brands Size 8

Assorted Brands

Size 8
$4.99 $31

$3.49 30% off with

Janie and Jack Size 6-12 mo
Price Drop
View Product: Janie and Jack Size 6-12 mo

Janie and Jack

Size 6-12 mo
$4.99 $34

$2.99 40% off with

Assorted Brands Size 18
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View Product: Assorted Brands Size 18

Assorted Brands

Size 18
$4.99 $41

$2.99 40% off with

Champion Size Small youth
Price Drop
View Product: Champion Size Small youth

Champion

Size Small youth
$4.99 $20

$2.99 40% off with

Adidas Size Medium kids
Price Drop
View Product: Adidas Size Medium kids

Adidas

Size Medium kids
$4.99 $38

$3.49 30% off with

Carter's Size 9 mo
Price Drop
View Product: Carter's Size 9 mo

Carter's

Size 9 mo
$5.99 $27

$4.19 30% off with

Carter's Size 18 mo
Price Drop
View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$5.99 $27

$4.19 30% off with

Unbranded Size 12 mo
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View Product: Unbranded Size 12 mo

Unbranded

Size 12 mo
$5.99 $20

$3.59 40% off with

DKNY Size 4T
Price Drop
View Product: DKNY Size 4T

DKNY

Size 4T
$5.99 $43

$3.59 40% off with

Shaun White Size 6
Price Drop
View Product: Shaun White Size 6

Shaun White

Size 6
$5.99 $31

$3.59 40% off with

Gap Kids Size 14
Price Drop
View Product: Gap Kids Size 14

Gap Kids

Size 14
$17.99 $40

$10.79 40% off with

Nike Size Small youth
Price Drop
View Product: Nike Size Small youth

Nike

Size Small youth
$8.99 $38

$5.39 40% off with

Adidas Size 14
Price Drop
View Product: Adidas Size 14

Adidas

Size 14
$16.99 $38

$11.89 30% off with

Carter's Size Newborn
Price Drop
View Product: Carter's Size Newborn

Carter's

Size Newborn
$8.99 $20

$5.39 40% off with

Cherokee Size 3T
Price Drop
View Product: Cherokee Size 3T

Cherokee

Size 3T
$10.99 $26

$7.69 30% off with

Jordan Size 7
Price Drop
View Product: Jordan Size 7

Jordan

Size 7
$15.99 $46

$9.59 40% off with

Assorted Brands Size Medium kids
Price Drop
View Product: Assorted Brands Size Medium kids

Assorted Brands

Size Medium kids
$12.99 $31

$9.09 30% off with

Assorted Brands Size 0-3 mo
Price Drop
View Product: Assorted Brands Size 0-3 mo

Assorted Brands

Size 0-3 mo
$13.99 $41

$8.39 40% off with

Tailor Vintage Size 4
Price Drop
View Product: Tailor Vintage Size 4

Tailor Vintage

Size 4
$21.99 $85

$13.19 40% off with

Carter's Size 2T
Price Drop
View Product: Carter's Size 2T

Carter's

Size 2T
$5.99 $20

$4.19 30% off with

Carter's Size 8
Price Drop
View Product: Carter's Size 8

Carter's

Size 8
$7.99 $31

$5.59 30% off with

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