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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.

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11,945 items·
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Filtering byBoys: activewear
    Little Marc Jacobs Size 6 mo
    Price Drop
    View Product: Little Marc Jacobs Size 6 mo

    Little Marc Jacobs

    Size 6 mo
    $79.99 $200

    $47.99 40% off with

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

    Zara

    Size 4T
    $8.99 $43

    $5.39 40% off with

    Assorted Brands Size 130 cm
    Price Drop
    View Product: Assorted Brands Size 130 cm

    Assorted Brands

    Size 130 cm
    $10.99 $41

    $6.59 40% off with

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

    Reebok

    Size Medium kids
    $10.99 $51

    $6.59 40% off with

    Majestic Size 4
    View Product: Majestic Size 4

    Majestic

    Size 4
    $19.99 $51

    $13.99 30% off with

    Franklin Size Large kids
    Price Drop
    View Product: Franklin Size Large kids

    Franklin

    Size Large kids
    $6.99 $15

    $4.19 40% off with

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

    Carter's

    Size 18 mo
    $6.99 $20

    $4.19 40% off with

    Baby Gap Size 3T
    View Product: Baby Gap Size 3T

    Baby Gap

    Size 3T
    $8.99 $18

    $6.29 30% off with

    Polo by Ralph Lauren Size 10
    Price Drop
    View Product: Polo by Ralph Lauren Size 10

    Polo by Ralph Lauren

    Size 10
    $11.99 $51

    $8.39 30% off with

    Sherpa Size X-Large youth
    Price Drop
    View Product: Sherpa Size X-Large youth

    Sherpa

    Size X-Large youth
    $23.99 $74

    $14.39 40% off with

    CALVIN KLEIN JEANS Size 7
    Price Drop
    View Product: CALVIN KLEIN JEANS Size 7

    CALVIN KLEIN JEANS

    Size 7
    $8.99 $31

    $6.29 30% off with

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

    Baby Gap

    Size 18-24 mo
    $10.99 $30

    $7.69 30% off with

    OshKosh B'gosh Size 6
    Price Drop
    View Product: OshKosh B'gosh Size 6

    OshKosh B'gosh

    Size 6
    $7.99 $41

    $5.59 30% off with

    Converse Size 10
    View Product: Converse Size 10

    Converse

    Size 10
    $20.99 $31

    $14.69 30% off with

    Nike Size Medium youth
    View Product: Nike Size Medium youth

    Nike

    Size Medium youth
    $20.99 $38

    $14.69 30% off with

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

    Heat Gear by Under Armour

    Size X-Large youth
    $15.99 $31

    $11.19 30% off with

    Spyder Size 4
    View Product: Spyder Size 4

    Spyder

    Size 4
    $23.99 $64

    $16.79 30% off with

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

    Baby Gap

    Size 3
    $20.99 $40

    $12.59 40% off with

    Cafe Press Size Small youth
    Price Drop
    View Product: Cafe Press Size Small youth

    Cafe Press

    Size Small youth
    $14.99 $51

    $8.99 40% off with

    Assorted Brands Size 5
    Price Drop
    View Product: Assorted Brands Size 5

    Assorted Brands

    Size 5
    $27.99 $51

    $16.79 40% off with

    Rugged Bear Size 7
    Price Drop
    View Product: Rugged Bear Size 7

    Rugged Bear

    Size 7
    $26.99 $92

    $13.49 50% off with

    Crewcuts Size 12
    Price Drop
    View Product: Crewcuts Size 12

    Crewcuts

    Size 12
    $14.99 $46

    $7.49 50% off with

    Unbranded Size 12 mo
    Price Drop
    View Product: Unbranded Size 12 mo

    Unbranded

    Size 12 mo
    $12.99 $41

    $6.49 50% off with

    Adidas Size 4
    View Product: Adidas Size 4

    Adidas

    Size 4
    $20.99 $32

    $14.69 30% off with

    NFL Size 4T
    View Product: NFL Size 4T

    NFL

    Size 4T
    $8.99 $38

    $6.29 30% off with

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

    Carter's

    Size 4T
    $27.99 $51

    $16.79 40% off with

    Old Navy Size X-Small kids
    Price Drop
    View Product: Old Navy Size X-Small kids

    Old Navy

    Size X-Small kids
    $18.99 $40

    $9.49 50% off with

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

    Nike

    Size Small youth
    $11.99 $51

    $5.99 50% off with

    OshKosh B'gosh Size 12 mo
    Price Drop
    View Product: OshKosh B'gosh Size 12 mo

    OshKosh B'gosh

    Size 12 mo
    $8.99 $22

    $4.49 50% off with

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

    Baby Gap

    Size 2
    $7.99 $18

    $3.99 50% off with

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

    Unbranded

    Size 18 mo
    $7.99 $20

    $3.99 50% off with

    Unbranded Size 2
    Price Drop
    View Product: Unbranded Size 2

    Unbranded

    Size 2
    $10.99 $20

    $5.49 50% off with

    Gap Size X-Large youth
    View Product: Gap Size X-Large youth

    Gap

    Size X-Large youth
    $17.99 $55

    $12.59 30% off with

    Unbranded Size 4T
    View Product: Unbranded Size 4T

    Unbranded

    Size 4T
    $9.99 $26

    $6.99 30% off with

    Columbia Size 6 mo
    Price Drop
    View Product: Columbia Size 6 mo

    Columbia

    Size 6 mo
    $17.99 $41

    $8.99 50% off with

    Assorted Brands Size 12
    View Product: Assorted Brands Size 12

    Assorted Brands

    Size 12
    $8.99 $31

    $6.29 30% off with

    RBX Size 10
    Rare Find
    View Product: RBX Size 10

    RBX

    Size 10
    $8.99 $51

    $6.29 30% off with

    Gap Kids Size 4
    View Product: Gap Kids Size 4

    Gap Kids

    Size 4
    $11.99 $25

    $8.39 30% off with

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

    Baby Gap

    Size 18 mo
    $7.99 $30

    $5.59 30% off with

    Jordan Size 10
    View Product: Jordan Size 10

    Jordan

    Size 10
    $16.99 $61

    $11.89 30% off with

    Sovereign Code Size 18
    Price Drop
    View Product: Sovereign Code Size 18

    Sovereign Code

    Size 18
    $9.99 $31

    $6.99 30% off with

    Avia Size 4T
    View Product: Avia Size 4T

    Avia

    Size 4T
    $12.99 $19

    $9.09 30% off with

    Adidas Size 16
    View Product: Adidas Size 16

    Adidas

    Size 16
    $9.99 $38

    $6.99 30% off with

    Lionsdale London Size 8
    View Product: Lionsdale London Size 8

    Lionsdale London

    Size 8
    $12.99 $41

    $9.09 30% off with

    Assorted Brands Size 8
    Price Drop
    View Product: Assorted Brands Size 8

    Assorted Brands

    Size 8
    $11.99 $31

    $8.39 30% off with

    Nike Size 7
    View Product: Nike Size 7

    Nike

    Size 7
    $12.99 $38

    $9.09 30% off with

    Nike Size Large youth
    View Product: Nike Size Large youth

    Nike

    Size Large youth
    $12.99 $38

    $9.09 30% off with

    Lucky Brand Size 4T
    Price Drop
    View Product: Lucky Brand Size 4T

    Lucky Brand

    Size 4T
    $11.99 $43

    $8.39 30% off with

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

    Old Navy

    Size 12-18 mo
    $12.99 $30

    $9.09 30% off with

    Gap Kids Size 4
    View Product: Gap Kids Size 4

    Gap Kids

    Size 4
    $11.99 $40

    $8.39 30% off with

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