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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.

11,319 items·
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Filtering byBoys: activewear
    Carter's Size 4T
    Price Drop
    View Product: Carter's Size 4T

    Carter's

    Size 4T
    $10.99 $26

    $6.59 40% off with

    Athleta Size 6
    View Product: Athleta Size 6

    Athleta

    Size 6
    $23.99 $46

    $16.79 30% off with

    Old Navy Size 12-18 mo
    View Product: Old Navy Size 12-18 mo

    Old Navy

    Size 12-18 mo
    $9.99 $20

    $6.99 30% off with

    Old Navy Size 0-3 mo
    View Product: Old Navy Size 0-3 mo

    Old Navy

    Size 0-3 mo
    $12.99 $20

    $9.09 30% off with

    Puma Size 24 mo
    Price Drop
    View Product: Puma Size 24 mo

    Puma

    Size 24 mo
    $5.99 $20

    $2.99 50% off with

    Assorted Brands Size Small youth
    Price Drop
    View Product: Assorted Brands Size Small youth

    Assorted Brands

    Size Small youth
    $5.99 $31

    $2.99 50% off with

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

    Assorted Brands

    Size Large kids
    $5.99 $31

    $2.99 50% off with

    Assorted Brands Size Small youth
    Price Drop
    View Product: Assorted Brands Size Small youth

    Assorted Brands

    Size Small youth
    $5.99 $31

    $2.99 50% off with

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

    OshKosh B'gosh

    Size 2T
    $13.99 $40

    $6.99 50% off with

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

    Circo

    Size 3T
    $8.99 $13

    $4.49 50% off with

    OshKosh B'gosh Size 4T
    Price Drop
    View Product: OshKosh B'gosh Size 4T

    OshKosh B'gosh

    Size 4T
    $7.99 $34

    $5.59 30% off with

    Spyder Size 14
    Price Drop
    View Product: Spyder Size 14

    Spyder

    Size 14
    $61.99 $153

    $37.19 40% off with

    Gymboree Size 10
    View Product: Gymboree Size 10

    Gymboree

    Size 10
    $15.99 $25

    $11.19 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
    $5.99 $14

    $3.59 40% off with

    Carter's Size 3T
    Price Drop
    View Product: Carter's Size 3T

    Carter's

    Size 3T
    $7.99 $26

    $4.79 40% off with

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

    Carter's

    Size 6
    $7.99 $31

    $4.79 40% off with

    Baby Gap Size 2T
    Price Drop
    View Product: Baby Gap Size 2T

    Baby Gap

    Size 2T
    $13.99 $40

    $8.39 40% off with

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

    Under Armour

    Size Large youth
    $19.99 $51

    $13.99 30% off with

    REI Size 6
    View Product: REI Size 6

    REI

    Size 6
    $11.99 $38

    $8.39 30% off with

    Pro Player Size 14
    Price Drop
    View Product: Pro Player Size 14

    Pro Player

    Size 14
    $11.99 $15

    $8.39 30% off with

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

    Carter's

    Size 8
    $14.99 $31

    $10.49 30% off with

    An Original Penguin by Munsingwear Size 8
    View Product: An Original Penguin by Munsingwear Size 8

    An Original Penguin by Munsingwear

    Size 8
    $10.99 $41

    $7.69 30% off with

    Gap Kids Size Large youth
    View Product: Gap Kids Size Large youth

    Gap Kids

    Size Large youth
    $11.99 $40

    $8.39 30% off with

    Gap Kids Size 4
    View Product: Gap Kids Size 4

    Gap Kids

    Size 4
    $10.99 $40

    $7.69 30% off with

    Lands' End Size 10
    Price Drop
    View Product: Lands' End Size 10

    Lands' End

    Size 10
    $8.99 $31

    $5.39 40% off with

    Carter's Size 3T
    View Product: Carter's Size 3T

    Carter's

    Size 3T
    $13.99 $26

    $9.79 30% off with

    Unbranded Size 4T
    View Product: Unbranded Size 4T

    Unbranded

    Size 4T
    $11.99 $26

    $8.39 30% off with

    Gap Kids Size 4
    View Product: Gap Kids Size 4

    Gap Kids

    Size 4
    $13.99 $40

    $9.79 30% off with

    Under Armour Size X-Large youth
    View Product: Under Armour Size X-Large youth

    Under Armour

    Size X-Large youth
    $14.99 $38

    $10.49 30% off with

    NFL Size 2T
    View Product: NFL Size 2T

    NFL

    Size 2T
    $12.99 $41

    $9.09 30% off with

    Gymboree Size 4
    View Product: Gymboree Size 4

    Gymboree

    Size 4
    $9.99 $20

    $6.99 30% off with

    iXtreme Outfitters Size 12
    View Product: iXtreme Outfitters Size 12

    iXtreme Outfitters

    Size 12
    $23.99 $46

    $16.79 30% off with

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

    Carter's

    Size 24 mo
    $16.99 $41

    $11.89 30% off with

    Gymboree Size 3
    View Product: Gymboree Size 3

    Gymboree

    Size 3
    $9.99 $20

    $6.99 30% off with

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

    Carter's

    Size 24 mo
    $15.99 $41

    $11.19 30% off with

    Unbranded Size 4T
    View Product: Unbranded Size 4T

    Unbranded

    Size 4T
    $11.99 $26

    $8.39 30% off with

    Carter's Size 3T
    View Product: Carter's Size 3T

    Carter's

    Size 3T
    $9.99 $34

    $6.99 30% off with

    ZeroXposur Size 8 Slim
    View Product: ZeroXposur Size 8 Slim

    ZeroXposur

    Size 8 Slim
    $12.99 $38

    $9.09 30% off with

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

    Baby Gap

    Size 0-3 mo
    $11.99 $18

    $8.39 30% off with

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

    Carter's

    Size 18 mo
    $12.99 $20

    $7.79 40% off with

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

    Nickelodeon

    Size 3T
    $11.99 $19

    $7.19 40% off with

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

    Adidas

    Size 3T
    $16.99 $32

    $10.19 40% off with

    Pacific Trail Size 5T
    Price Drop
    View Product: Pacific Trail Size 5T

    Pacific Trail

    Size 5T
    $15.99 $32

    $9.59 40% off with

    Pacific Trail Size 3T
    Price Drop
    View Product: Pacific Trail Size 3T

    Pacific Trail

    Size 3T
    $15.99 $32

    $9.59 40% off with

    Gap Kids Size Small kids
    Price Drop
    View Product: Gap Kids Size Small kids

    Gap Kids

    Size Small kids
    $12.99 $40

    $7.79 40% off with

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

    Baby Gap

    Size 12-18 mo
    $8.99 $30

    $6.29 30% off with

    Tek Gear Size 8
    Price Drop
    View Product: Tek Gear Size 8

    Tek Gear

    Size 8
    $8.99 $31

    $5.39 40% off with

    Cherokee Size 4
    Price Drop
    View Product: Cherokee Size 4

    Cherokee

    Size 4
    $7.99 $17

    $4.79 40% off with

    Nike Size Large youth
    View Product: Nike Size Large youth

    Nike

    Size Large youth
    $17.99 $38

    $12.59 30% off with

    Old Navy Size 2T
    View Product: Old Navy Size 2T

    Old Navy

    Size 2T
    $13.99 $20

    $9.79 30% off with

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