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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.

11,393 items·
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Filtering byBoys: activewear
    Nike Size Large youth
    View Product: Nike Size Large youth

    Nike

    Size Large youth
    $12.99 $38

    $9.09 30% off with

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

    Unbranded

    Size Small youth
    $9.99 $31

    $6.99 30% off with

    Adidas Size Small youth
    View Product: Adidas Size Small youth

    Adidas

    Size Small youth
    $16.99 $51

    $11.89 30% off with

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

    NFL

    Size 3T
    $8.99 $38

    $4.49 50% off with

    Adidas Size 7
    Price Drop
    View Product: Adidas Size 7

    Adidas

    Size 7
    $14.99 $51

    $10.49 30% off with

    Petit Lem Size 12 mo
    Price Drop
    View Product: Petit Lem Size 12 mo

    Petit Lem

    Size 12 mo
    $8.99 $15

    $4.49 50% off with

    Arctix Size 3T
    View Product: Arctix Size 3T

    Arctix

    Size 3T
    $8.99 $26

    $6.29 30% off with

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

    Carter's

    Size 12 mo
    $6.99 $20

    $4.89 30% off with

    Xersion Size X-Large kids
    Price Drop
    View Product: Xersion Size X-Large kids

    Xersion

    Size X-Large kids
    $9.99 $31

    $5.99 40% off with

    Baby Gap Size 6-12 mo
    View Product: Baby Gap Size 6-12 mo

    Baby Gap

    Size 6-12 mo
    $7.99 $30

    $5.59 30% off with

    Abercrombie Size 10
    View Product: Abercrombie Size 10

    Abercrombie

    Size 10
    $10.99 $35

    $7.69 30% off with

    Climate Control Size 4
    Price Drop
    View Product: Climate Control Size 4

    Climate Control

    Size 4
    $11.99 $26

    $7.19 40% off with

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

    Assorted Brands

    Size Small youth
    $11.99 $41

    $7.19 40% off with

    Nike Size Small kids
    View Product: Nike Size Small kids

    Nike

    Size Small kids
    $11.99 $43

    $8.39 30% off with

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

    Under Armour

    Size X-Large youth
    $12.99 $38

    $9.09 30% off with

    Crewcuts Size 6
    Price Drop
    View Product: Crewcuts Size 6

    Crewcuts

    Size 6
    $10.99 $46

    $7.69 30% off with

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

    Zara Baby

    Size 3
    $9.99 $34

    $5.99 40% off with

    Juicy Couture Size 12-18 mo
    Price Drop
    View Product: Juicy Couture Size 12-18 mo

    Juicy Couture

    Size 12-18 mo
    $11.99 $61

    $5.99 50% off with

    iXtreme Outfitters Size 5
    View Product: iXtreme Outfitters Size 5

    iXtreme Outfitters

    Size 5
    $19.99 $38

    $13.99 30% off with

    Nike Size 12 mo
    View Product: Nike Size 12 mo

    Nike

    Size 12 mo
    $8.99 $34

    $6.29 30% off with

    Emporio Armani Size 10
    View Product: Emporio Armani Size 10

    Emporio Armani

    Size 10
    $40.99 $138

    $28.69 30% off with

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

    Jordan

    Size Small youth
    $21.99 $46

    $15.39 30% off with

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

    Under Armour

    Size 18 mo
    $17.99 $38

    $12.59 30% off with

    Under Armour Size Small kids
    View Product: Under Armour Size Small kids

    Under Armour

    Size Small kids
    $10.99 $32

    $7.69 30% off with

    NFL Size 8
    View Product: NFL Size 8

    NFL

    Size 8
    $10.99 $46

    $7.69 30% off with

    OshKosh B'gosh Size 5
    View Product: OshKosh B'gosh Size 5

    OshKosh B'gosh

    Size 5
    $10.99 $26

    $7.69 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

    Nike Size 7
    View Product: Nike Size 7

    Nike

    Size 7
    $16.99 $51

    $11.89 30% off with

    Okie Dokie Size 5T
    View Product: Okie Dokie Size 5T

    Okie Dokie

    Size 5T
    $23.99 $42

    $16.79 30% off with

    WonderKids Size 5T
    Price Drop
    View Product: WonderKids Size 5T

    WonderKids

    Size 5T
    $12.99 $26

    $7.79 40% off with

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

    Cherokee

    Size 4T
    $14.99 $26

    $8.99 40% off with

    Blue Ice Size 4T
    Price Drop
    View Product: Blue Ice Size 4T

    Blue Ice

    Size 4T
    $14.99 $26

    $8.99 40% off with

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

    Circo

    Size 3T
    $14.99 $26

    $8.99 40% off with

    Puma Size 10
    View Product: Puma Size 10

    Puma

    Size 10
    $14.99 $31

    $10.49 30% off with

    Old Navy Size 18-24 mo
    View Product: Old Navy Size 18-24 mo

    Old Navy

    Size 18-24 mo
    $11.99 $20

    $8.39 30% off with

    Baby Gap Size 2
    View Product: Baby Gap Size 2

    Baby Gap

    Size 2
    $8.99 $30

    $6.29 30% off with

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

    Unbranded

    Size 6 mo
    $8.99 $27

    $6.29 30% off with

    Tek Gear Size 8
    View Product: Tek Gear Size 8

    Tek Gear

    Size 8
    $7.99 $15

    $5.59 30% off with

    Carter's Size 2T
    View Product: Carter's Size 2T

    Carter's

    Size 2T
    $7.99 $20

    $5.59 30% off with

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

    Baby Gap

    Size 18-24 mo
    $7.99 $18

    $5.59 30% off with

    Fila Sport Size 10
    View Product: Fila Sport Size 10

    Fila Sport

    Size 10
    $10.99 $38

    $7.69 30% off with

    Crewcuts Size 8
    Price Drop
    View Product: Crewcuts Size 8

    Crewcuts

    Size 8
    $13.99 $61

    $9.79 30% off with

    Arctic Quest Size 12
    Price Drop
    View Product: Arctic Quest Size 12

    Arctic Quest

    Size 12
    $12.99 $31

    $7.79 40% off with

    Orage Size 8
    Price Drop
    View Product: Orage Size 8

    Orage

    Size 8
    $41.99 $92

    $25.19 40% off with

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

    Carter's

    Size 4T
    $22.99 $51

    $11.49 50% off with

    Polo by Ralph Lauren Size 3T
    Price Drop
    View Product: Polo by Ralph Lauren Size 3T

    Polo by Ralph Lauren

    Size 3T
    $18.99 $50

    $11.39 40% off with

    Sport Essentials Size 8
    Price Drop
    View Product: Sport Essentials Size 8

    Sport Essentials

    Size 8
    $17.99 $38

    $8.99 50% off with

    Crewcuts Outlet Size 4T
    Price Drop
    View Product: Crewcuts Outlet Size 4T

    Crewcuts Outlet

    Size 4T
    $9.99 $19

    $6.99 30% off with

    H&M Size 11
    View Product: H&M Size 11

    H&M

    Size 11
    $12.99 $31

    $9.09 30% off with

    Crewcuts Outlet Size 4T
    Price Drop
    View Product: Crewcuts Outlet Size 4T

    Crewcuts Outlet

    Size 4T
    $8.99 $19

    $6.29 30% off with

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