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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.

3,578 items·
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Filtering byBoys: activewear
Reebok Size 8
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View Product: Reebok Size 8

Reebok

Size 8
$6.99 $38

$4.19 40% off with

Nike Size Small youth
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View Product: Nike Size Small youth

Nike

Size Small youth
$14.99 $51

$7.49 50% off with

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

Carter's

Size 3 mo
$10.99 $20

$5.49 50% off with

Jumping Beans Size 2T
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View Product: Jumping Beans Size 2T

Jumping Beans

Size 2T
$8.99 $10

$4.49 50% off with

ZeroXposur Size 14
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View Product: ZeroXposur Size 14

ZeroXposur

Size 14
$31.99 $77

$15.99 50% off with

Paul Frank Size X-Small  kids
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View Product: Paul Frank Size X-Small kids

Paul Frank

Size X-Small kids
$21.99 $51

$10.99 50% off with

Baby Gap Size 0-3 mo
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View Product: Baby Gap Size 0-3 mo

Baby Gap

Size 0-3 mo
$28.99 $88

$17.39 40% off with

Nike Size Medium youth
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View Product: Nike Size Medium youth

Nike

Size Medium youth
$18.99 $38

$13.29 30% off with

Baby Gap Size 18-24 mo
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View Product: Baby Gap Size 18-24 mo

Baby Gap

Size 18-24 mo
$16.99 $40

$10.19 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
$19.99 $40

$11.99 40% off with

Under Armour Size Small youth
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View Product: Under Armour Size Small youth

Under Armour

Size Small youth
$11.99 $38

$8.39 30% off with

Marvel Size 2T
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View Product: Marvel Size 2T

Marvel

Size 2T
$7.99 $20

$3.99 50% off with

Under Armour Size 18 mo
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View Product: Under Armour Size 18 mo

Under Armour

Size 18 mo
$25.99 $38

$12.99 50% off with

Carter's Size 3 mo
Price Drop
View Product: Carter's Size 3 mo

Carter's

Size 3 mo
$7.99 $20

$4.79 40% off with

Carter's Size 12 mo
Price Drop
View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$6.99 $20

$4.19 40% off with

Carter's Size 12 mo
Price Drop
View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$9.99 $20

$5.99 40% off with

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

Carter's

Size 6 mo
$6.99 $20

$4.19 40% off with

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

Carter's

Size Newborn
$6.99 $20

$4.19 40% off with

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

Carter's

Size 6 mo
$9.99 $20

$5.99 40% off with

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

Carter's

Size 9 mo
$6.99 $20

$4.19 40% off with

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

Carter's

Size 6 mo
$6.99 $20

$4.19 40% off with

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

Carter's

Size 6 mo
$6.99 $20

$4.19 40% off with

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

Carter's

Size Newborn
$6.99 $20

$4.19 40% off with

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

Carter's

Size 18 mo
$6.99 $20

$4.19 40% off with

Puma Size 18 mo
Price Drop
View Product: Puma Size 18 mo

Puma

Size 18 mo
$6.99 $27

$4.19 40% off with

ZeroXposur Size 10
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View Product: ZeroXposur Size 10

ZeroXposur

Size 10
$9.99 $38

$4.99 50% off with

Puma Size 6
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View Product: Puma Size 6

Puma

Size 6
$8.99 $31

$5.39 40% off with

Crewcuts Outlet Size 3
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View Product: Crewcuts Outlet Size 3

Crewcuts Outlet

Size 3
$11.99 $26

$7.19 40% off with

Tommy Hilfiger Size 18 mo
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View Product: Tommy Hilfiger Size 18 mo

Tommy Hilfiger

Size 18 mo
$7.99 $26

$4.79 40% off with

Tommy Hilfiger Size 2T
Price Drop
View Product: Tommy Hilfiger Size 2T

Tommy Hilfiger

Size 2T
$7.99 $34

$4.79 40% off with

OshKosh B'gosh Size 2T
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View Product: OshKosh B'gosh Size 2T

OshKosh B'gosh

Size 2T
$15.99 $40

$9.59 40% off with

Quiksilver Size 12
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View Product: Quiksilver Size 12

Quiksilver

Size 12
$31.99 $61

$19.19 40% off with

Andy & Evan Size 8
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View Product: Andy & Evan Size 8

Andy & Evan

Size 8
$21.99 $102

$13.19 40% off with

Carter's Size 4T
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View Product: Carter's Size 4T

Carter's

Size 4T
$8.99 $26

$6.29 30% off with

Real Madrid Size Medium kids
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View Product: Real Madrid Size Medium kids

Real Madrid

Size Medium kids
$24.99 $92

$12.49 50% off with

Spyder Size 14
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View Product: Spyder Size 14

Spyder

Size 14
$14.99 $102

$7.49 50% off with

Baby Gap Size 3
Price Drop
View Product: Baby Gap Size 3

Baby Gap

Size 3
$7.99 $15

$4.79 40% off with

Assorted Brands Size 12 mo
Price Drop
View Product: Assorted Brands Size 12 mo

Assorted Brands

Size 12 mo
$10.99 $20

$6.59 40% off with

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

Carter's

Size 9 mo
$7.99 $20

$4.79 40% off with

Body Glove Size 3T
Price Drop
View Product: Body Glove Size 3T

Body Glove

Size 3T
$7.99 $43

$4.79 40% off with

Carter's Size 12 mo
Price Drop
View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$10.99 $28

$6.59 40% off with

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

Carter's

Size 9 mo
$7.99 $20

$4.79 40% off with

Carter's Size 3 mo
Price Drop
View Product: Carter's Size 3 mo

Carter's

Size 3 mo
$7.99 $20

$4.79 40% off with

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

Carter's

Size 24 mo
$6.99 $20

$4.19 40% off with

Avia Size Small kids
Price Drop
View Product: Avia Size Small kids

Avia

Size Small kids
$6.99 $19

$4.19 40% off with

Assorted Brands Size 12 mo
Price Drop
View Product: Assorted Brands Size 12 mo

Assorted Brands

Size 12 mo
$6.99 $27

$4.19 40% off with

Carter's Size 12 mo
Price Drop
View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$6.99 $20

$4.19 40% off with

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

Carter's

Size 18 mo
$9.99 $20

$5.99 40% off with

H&M Size 0-3 mo
Price Drop
View Product: H&M Size 0-3 mo

H&M

Size 0-3 mo
$9.99 $15

$5.99 40% off with

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

Carter's

Size 6 mo
$9.99 $20

$5.99 40% off with

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