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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.

14,660 items·
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Filtering byBoys: activewear
    Puma Size 18 mo
    Price Drop
    View Product: Puma Size 18 mo

    Puma

    Size 18 mo
    $11.99 $20

    $7.19 40% off with

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

    Under Armour

    Size Small youth
    $10.99 $38

    $5.49 50% off with

    Energy Zone Size 10
    New with tags
    View Product: Energy Zone Size 10

    Energy Zone

    Size 10
    $8.99 $19.99

    $6.29 30% off with

    Baby Gap Size 3-6 mo
    View Product: Baby Gap Size 3-6 mo

    Baby Gap

    Size 3-6 mo
    $8.99 $30

    $6.29 30% off with

    Baby Gap Size 2
    View Product: Baby Gap Size 2

    Baby Gap

    Size 2
    $8.99 $18

    $6.29 30% off with

    Nautica Size 2T
    View Product: Nautica Size 2T

    Nautica

    Size 2T
    $8.99 $20

    $6.29 30% off with

    Polo by Ralph Lauren Size 4T
    View Product: Polo by Ralph Lauren Size 4T

    Polo by Ralph Lauren

    Size 4T
    $8.99 $32

    $6.29 30% off with

    Ralph Lauren Size 9 mo
    View Product: Ralph Lauren Size 9 mo

    Ralph Lauren

    Size 9 mo
    $8.99 $41

    $6.29 30% 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

    Rockets of Awesome Size 4
    View Product: Rockets of Awesome Size 4

    Rockets of Awesome

    Size 4
    $7.99 $34

    $5.59 30% off with

    Gymboree Size 12-18 mo
    View Product: Gymboree Size 12-18 mo

    Gymboree

    Size 12-18 mo
    $10.99 $35

    $7.69 30% off with

    Name It Size 7
    View Product: Name It Size 7

    Name It

    Size 7
    $7.99 $31

    $5.59 30% off with

    Ideology Size 3T
    View Product: Ideology Size 3T

    Ideology

    Size 3T
    $7.99 $34

    $5.59 30% off with

    Janie and Jack Size 6-12 mo
    View Product: Janie and Jack Size 6-12 mo

    Janie and Jack

    Size 6-12 mo
    $7.99 $34

    $5.59 30% off with

    Gymboree Size 12-18 mo
    View Product: Gymboree Size 12-18 mo

    Gymboree

    Size 12-18 mo
    $7.99 $35

    $5.59 30% off with

    Tek Gear Size 10
    View Product: Tek Gear Size 10

    Tek Gear

    Size 10
    $7.99 $31

    $5.59 30% off with

    Sesame Street Size 3T
    Price Drop
    View Product: Sesame Street Size 3T

    Sesame Street

    Size 3T
    $10.99 $19

    $6.59 40% off with

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

    Baby Gap

    Size 3T
    $10.99 $30

    $6.59 40% off with

    Gap Kids Size 6
    Price Drop
    View Product: Gap Kids Size 6

    Gap Kids

    Size 6
    $11.99 $40

    $7.19 40% off with

    Gap Kids Size 6
    Price Drop
    View Product: Gap Kids Size 6

    Gap Kids

    Size 6
    $13.99 $40

    $8.39 40% off with

    OshKosh B'gosh Size 12
    View Product: OshKosh B'gosh Size 12

    OshKosh B'gosh

    Size 12
    $11.99 $31

    $8.39 30% off with

    NHL Size 12 mo
    View Product: NHL Size 12 mo

    NHL

    Size 12 mo
    $8.99 $27

    $6.29 30% off with

    C9 By Champion Size 4
    Price Drop
    View Product: C9 By Champion Size 4

    C9 By Champion

    Size 4
    $9.99 $26

    $5.99 40% off with

    Joe Fresh Size 18-24 mo
    Price Drop
    View Product: Joe Fresh Size 18-24 mo

    Joe Fresh

    Size 18-24 mo
    $12.99 $31

    $7.79 40% off with

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

    OshKosh B'gosh

    Size 6 mo
    $9.99 $22

    $5.99 40% off with

    Carter's Size 12
    Price Drop
    View Product: Carter's Size 12

    Carter's

    Size 12
    $11.99 $41

    $7.19 40% off with

    RBX Size 10
    Price Drop
    View Product: RBX Size 10

    RBX

    Size 10
    $11.99 $38

    $5.99 50% off with

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

    Assorted Brands

    Size Large kids
    $11.99 $48

    $8.39 30% off with

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

    Carter's

    Size 12 mo
    $10.99 $41

    $7.69 30% off with

    Old Navy Size Large youth
    View Product: Old Navy Size Large youth

    Old Navy

    Size Large youth
    $8.99 $17

    $6.29 30% off with

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

    Carter's

    Size 4T
    $8.99 $34

    $6.29 30% off with

    Adidas Size 10
    Price Drop
    View Product: Adidas Size 10

    Adidas

    Size 10
    $8.99 $38

    $5.39 40% off with

    OshKosh B'gosh Size 9 mo
    Price Drop
    View Product: OshKosh B'gosh Size 9 mo

    OshKosh B'gosh

    Size 9 mo
    $11.99 $22

    $7.19 40% off with

    OshKosh B'gosh Size 3T
    Price Drop
    View Product: OshKosh B'gosh Size 3T

    OshKosh B'gosh

    Size 3T
    $8.99 $34

    $5.39 40% off with

    Zara Kids Size 7
    Price Drop
    View Product: Zara Kids Size 7

    Zara Kids

    Size 7
    $12.99 $38

    $9.09 30% off with

    Air Jordan Size 10
    Price Drop
    View Product: Air Jordan Size 10

    Air Jordan

    Size 10
    $22.99 $61

    $13.79 40% off with

    Protection System Size 14
    Price Drop
    View Product: Protection System Size 14

    Protection System

    Size 14
    $13.99 $31

    $6.99 50% off with

    New Balance Size 10
    Price Drop
    View Product: New Balance Size 10

    New Balance

    Size 10
    $12.99 $46

    $6.49 50% off with

    Abercrombie & Fitch Size 11
    Price Drop
    View Product: Abercrombie & Fitch Size 11

    Abercrombie & Fitch

    Size 11
    $15.99 $46

    $9.59 40% off with

    Head Size Small youth
    View Product: Head Size Small youth

    Head

    Size Small youth
    $10.99 $38

    $7.69 30% off with

    Shaun White Size 12
    View Product: Shaun White Size 12

    Shaun White

    Size 12
    $9.99 $31

    $6.99 30% off with

    Head Size Small youth
    View Product: Head Size Small youth

    Head

    Size Small youth
    $9.99 $38

    $6.99 30% off with

    Urban Pipeline Size Medium youth
    View Product: Urban Pipeline Size Medium youth

    Urban Pipeline

    Size Medium youth
    $9.99 $31

    $6.99 30% off with

    H&M Size 7
    View Product: H&M Size 7

    H&M

    Size 7
    $26.99 $46

    $18.89 30% off with

    Gymboree Size 5
    View Product: Gymboree Size 5

    Gymboree

    Size 5
    $8.99 $35

    $6.29 30% off with

    Gymboree Size 5
    View Product: Gymboree Size 5

    Gymboree

    Size 5
    $11.99 $35

    $8.39 30% off with

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

    Assorted Brands

    Size Newborn
    $9.99 $20

    $4.99 50% off with

    Heat Gear by Under Armour Size Small youth
    Price Drop
    View Product: Heat Gear by Under Armour Size Small youth

    Heat Gear by Under Armour

    Size Small youth
    $13.99 $31

    $9.79 30% off with

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

    OshKosh B'gosh

    Size 6
    $12.99 $41

    $7.79 40% off with

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

    Carter's

    Size 3T
    $9.99 $26

    $5.99 40% off with