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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.

12,023 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
    $85.99 $200

    $51.59 40% off with

    32 Degrees Size Medium youth
    Price Drop
    View Product: 32 Degrees Size Medium youth

    32 Degrees

    Size Medium youth
    $10.99 $31

    $6.59 40% off with

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

    Gap Fit

    Size 8
    $8.99 $51

    $5.39 40% off with

    Reebok Size 14
    Price Drop
    View Product: Reebok Size 14

    Reebok

    Size 14
    $8.99 $51

    $5.39 40% off with

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

    Heat Gear by Under Armour

    Size Large youth
    $11.99 $31

    $8.39 30% off with

    The Children's Place Size 4
    View Product: The Children's Place Size 4

    The Children's Place

    Size 4
    $8.99 $18

    $6.29 30% off with

    Unbranded Size 2T
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    View Product: Unbranded Size 2T

    Unbranded

    Size 2T
    $9.99 $20

    $5.99 40% off with

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

    Unbranded

    Size 4T
    $7.99 $26

    $3.99 50% off with

    Tea Size 6-12 mo
    Price Drop
    View Product: Tea Size 6-12 mo

    Tea

    Size 6-12 mo
    $7.99 $26

    $4.79 40% off with

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

    Baby Gap

    Size 3T
    $6.99 $15

    $4.19 40% off with

    NFL Size Medium youth
    Price Drop
    View Product: NFL Size Medium youth

    NFL

    Size Medium youth
    $15.99 $61

    $11.19 30% off with

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

    Under Armour

    Size 18 mo
    $10.99 $26

    $7.69 30% off with

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

    Carter's

    Size 3 mo
    $9.99 $20

    $6.99 30% off with

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

    Carter's

    Size 6 mo
    $6.99 $20

    $4.89 30% off with

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

    Carter's

    Size 3 mo
    $9.99 $20

    $6.99 30% off with

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

    Carter's

    Size 9 mo
    $9.99 $20

    $6.99 30% off with

    Nike Size 8
    View Product: Nike Size 8

    Nike

    Size 8
    $17.99 $38

    $12.59 30% off with

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

    Under Armour

    Size Large youth
    $18.99 $38

    $11.39 40% off with

    Carter's Size 5
    View Product: Carter's Size 5

    Carter's

    Size 5
    $11.99 $34

    $8.39 30% off with

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

    Nikol

    Size 4T
    $12.99 $26

    $7.79 40% off with

    OshKosh B'gosh Size 7
    View Product: OshKosh B'gosh Size 7

    OshKosh B'gosh

    Size 7
    $9.99 $26

    $6.99 30% off with

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

    Under Armour

    Size Large youth
    $11.99 $38

    $8.39 30% off with

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

    Marvel

    Size X-Large youth
    $14.99 $31

    $10.49 30% off with

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

    Under Armour

    Size Large youth
    $10.99 $38

    $7.69 30% off with

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

    Carter's

    Size 3T
    $7.99 $26

    $3.99 50% off with

    Polo by Ralph Lauren Size 12 mo
    Price Drop
    View Product: Polo by Ralph Lauren Size 12 mo

    Polo by Ralph Lauren

    Size 12 mo
    $14.99 $50

    $7.49 50% 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 12 mo
    Price Drop
    View Product: Carter's Size 12 mo

    Carter's

    Size 12 mo
    $11.99 $20

    $7.19 40% off with

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

    Under Armour

    Size X-Large youth
    $9.99 $38

    $5.99 40% off with

    Under Armour Size 4T
    View Product: Under Armour Size 4T

    Under Armour

    Size 4T
    $20.99 $43

    $14.69 30% off with

    Nike Size 4T
    View Product: Nike Size 4T

    Nike

    Size 4T
    $23.99 $32

    $16.79 30% off with

    Adidas Size 4
    View Product: Adidas Size 4

    Adidas

    Size 4
    $22.99 $32

    $16.09 30% off with

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

    Puma

    Size 24 mo
    $8.99 $20

    $6.29 30% off with

    Primary Clothing Size 8
    Price Drop
    View Product: Primary Clothing Size 8

    Primary Clothing

    Size 8
    $12.99 $38

    $6.49 50% off with

    DKNY Size 8
    Price Drop
    View Product: DKNY Size 8

    DKNY

    Size 8
    $10.99 $51

    $5.49 50% off with

    Adidas Size 4
    Price Drop
    View Product: Adidas Size 4

    Adidas

    Size 4
    $8.99 $32

    $5.39 40% off with

    Baby Gap Size 4T
    Price Drop
    View Product: Baby Gap Size 4T

    Baby Gap

    Size 4T
    $7.99 $18

    $4.79 40% off with

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

    Under Armour

    Size Medium youth
    $17.99 $51

    $12.59 30% off with

    Baby Luxuries Size 12 mo
    Price Drop
    View Product: Baby Luxuries Size 12 mo

    Baby Luxuries

    Size 12 mo
    $9.99 $20

    $6.99 30% off with

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

    Carter's

    Size 4T
    $9.99 $26

    $6.99 30% off with

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

    Under Armour

    Size X-Small youth
    $14.99 $26

    $10.49 30% off with

    Adidas Size 4T
    View Product: Adidas Size 4T

    Adidas

    Size 4T
    $16.99 $32

    $11.89 30% off with

    Puma Size Small youth
    Rare Find
    View Product: Puma Size Small youth

    Puma

    Size Small youth
    $13.99 $41

    $9.79 30% off with

    Adidas Size 5
    View Product: Adidas Size 5

    Adidas

    Size 5
    $23.99 $32

    $16.79 30% off with

    Air Jordan Size 6
    Price Drop
    View Product: Air Jordan Size 6

    Air Jordan

    Size 6
    $11.99 $61

    $8.39 30% off with

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

    Snozu

    Size 3T
    $11.99 $26

    $7.19 40% off with

    Spyder Size 7
    Price Drop
    View Product: Spyder Size 7

    Spyder

    Size 7
    $28.99 $102

    $20.29 30% off with

    Nike Size Large youth
    View Product: Nike Size Large youth

    Nike

    Size Large youth
    $14.99 $51

    $10.49 30% off with

    Nike Size Large youth
    View Product: Nike Size Large youth

    Nike

    Size Large youth
    $13.99 $51

    $9.79 30% off with

    OshKosh B'gosh Size 24 mo
    Rare Find
    View Product: OshKosh B'gosh Size 24 mo

    OshKosh B'gosh

    Size 24 mo
    $7.99 $22

    $5.59 30% off with

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