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.

18,339 items·
Filtering byBoys: activewear
    REI Size 10
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    View Product: REI Size 10

    REI

    Size 10
    $17.99 $38
    Active by Old Navy Size 5

    View Product: Active by Old Navy Size 5

    Active by Old Navy

    Size 5
    $8.99 $21
    Bon Bebe Size 12 mo

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    Bon Bebe

    Size 12 mo
    $8.99 $20

    $7.19 20% off with

    C9 By Champion Size Medium kids

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    C9 By Champion

    Size Medium kids
    $6.99 $15
    Nike Size 6

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    Nike

    Size 6
    $9.99 $25

    $7.99 20% off with

    Old Navy Size 4

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    Old Navy

    Size 4
    $10.99 $20

    $8.79 20% off with

    Under Armour Size Large kids

    View Product: Under Armour Size Large kids

    Under Armour

    Size Large kids
    $15.99 $38

    $12.79 20% off with

    Reebok Size 10

    View Product: Reebok Size 10

    Reebok

    Size 10
    $9.99 $38

    $7.99 20% off with

    Under Armour Size Medium youth

    View Product: Under Armour Size Medium youth

    Under Armour

    Size Medium youth
    $17.99 $38

    $14.39 20% off with

    Healthtex Size 3T

    View Product: Healthtex Size 3T

    Healthtex

    Size 3T
    $8.99 $13
    Under Armour Size Small youth

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    Under Armour

    Size Small youth
    $13.99 $38

    $11.19 20% off with

    Everlast Size 5

    View Product: Everlast Size 5

    Everlast

    Size 5
    $7.99 $13

    $6.39 20% off with

    Gap Kids Size 6

    View Product: Gap Kids Size 6

    Gap Kids

    Size 6
    $13.99 $25

    $9.79 30% off with

    Gap Kids Size 8

    View Product: Gap Kids Size 8

    Gap Kids

    Size 8
    $13.99 $25

    $9.79 30% off with

    Gap Kids Size 4

    View Product: Gap Kids Size 4

    Gap Kids

    Size 4
    $13.99 $25

    $9.79 30% off with

    Under Armour Size Small youth

    View Product: Under Armour Size Small youth

    Under Armour

    Size Small youth
    $13.99 $38

    $9.79 30% off with

    Air Jordan Size Small youth

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    Air Jordan

    Size Small youth
    $13.99 $61

    $9.79 30% off with

    Under Armour Size 7

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    Under Armour

    Size 7
    $16.99 $26

    $10.19 40% off with

    Genuine Merchandise by Gen2 Size 14

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    Genuine Merchandise by Gen2

    Size 14
    $10.99 $31

    $7.69 30% off with

    Carter's Size 12 mo

    View Product: Carter's Size 12 mo

    Carter's

    Size 12 mo
    $11.99 $27

    $8.39 30% off with

    Active by Old Navy Size 8

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    Active by Old Navy

    Size 8
    $7.99 $19

    $6.39 20% off with

    Adidas Size 5

    View Product: Adidas Size 5

    Adidas

    Size 5
    $7.99 $21

    $6.39 20% off with

    Active by Old Navy Size 6

    View Product: Active by Old Navy Size 6

    Active by Old Navy

    Size 6
    $7.99 $19

    $6.39 20% off with

    Intradeco Apparel Size 6

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    Intradeco Apparel

    Size 6
    $7.99 $23

    $5.59 30% off with

    Adidas Size 6

    View Product: Adidas Size 6

    Adidas

    Size 6
    $7.99 $26

    $5.59 30% off with

    Reebok Size 6

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    Reebok

    Size 6
    $7.99 $26

    $5.59 30% off with

    Gymboree Size 2T
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    View Product: Gymboree Size 2T

    Gymboree

    Size 2T
    $8.99 $20

    $5.39 40% off with

    Carter's Size 12 mo
    Price Drop BadgePrice Drop

    View Product: Carter's Size 12 mo

    Carter's

    Size 12 mo
    $3.99 $20
    Disney Store Size Small kids
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    View Product: Disney Store Size Small kids

    Disney Store

    Size Small kids
    $3.99 $21
    Under Armour Size 3-6 mo
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    View Product: Under Armour Size 3-6 mo

    Under Armour

    Size 3-6 mo
    $16.99 $38

    $8.49 50% off with

    Carter's Size 12 mo
    Price Drop BadgePrice Drop

    View Product: Carter's Size 12 mo

    Carter's

    Size 12 mo
    $7.99 $20
    Nike Size Medium youth

    View Product: Nike Size Medium youth

    Nike

    Size Medium youth
    $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

    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
    $14.99 $31

    $10.49 30% off with

    Nike Size X-Large youth

    View Product: Nike Size X-Large youth

    Nike

    Size X-Large youth
    $22.99 $48

    $16.09 30% off with

    Under Armour Size Large youth

    View Product: Under Armour Size Large youth

    Under Armour

    Size Large youth
    $18.99 $38

    $13.29 30% off with

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

    Carter's

    Size 12 mo
    $5.99 $20
    Unbranded Size 0-3 mo
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    View Product: Unbranded Size 0-3 mo

    Unbranded

    Size 0-3 mo
    $8.99 $20

    $7.19 20% off with

    Carter's Size 12 mo

    View Product: Carter's Size 12 mo

    Carter's

    Size 12 mo
    $7.99 $20

    $5.59 30% off with

    Carter's Size 9 mo

    View Product: Carter's Size 9 mo

    Carter's

    Size 9 mo
    $10.99 $27

    $7.69 30% off with

    First Impressions Size 6-9 mo

    View Product: First Impressions Size 6-9 mo

    First Impressions

    Size 6-9 mo
    $10.99 $34

    $8.79 20% off with

    Assorted Brands Size 0-3 mo

    View Product: Assorted Brands Size 0-3 mo

    Assorted Brands

    Size 0-3 mo
    $9.99 $20

    $6.99 30% off with

    Russell Athletic Size X-Small  kids

    View Product: Russell Athletic Size X-Small kids

    Russell Athletic

    Size X-Small kids
    $6.99 $13

    $4.89 30% off with

    Under Armour Size 4

    View Product: Under Armour Size 4

    Under Armour

    Size 4
    $11.99 $32

    $8.39 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
    $11.99 $31

    $8.39 30% off with

    Carter's Size 3 mo

    View Product: Carter's Size 3 mo

    Carter's

    Size 3 mo
    $11.99 $20

    $8.39 30% off with

    Adidas Size X-Large kids

    View Product: Adidas Size X-Large kids

    Adidas

    Size X-Large kids
    $11.99 $26

    $8.39 30% off with

    Nike Size Medium youth

    View Product: Nike Size Medium youth

    Nike

    Size Medium youth
    $14.99 $38

    $10.49 30% off with

    Nike Size 6

    View Product: Nike Size 6

    Nike

    Size 6
    $11.99 $25

    $8.39 30% off with

    Heat Gear by Under Armour Size Small youth

    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