Boys' Activewear

ChevronNavigation chevron icon

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.

24,575 items
Brothers Size 7
Brothers Size 7

View Product: Brothers Size 7

Brothers

Size 7
$3.99 $15
Carter's Size 6 mo
Carter's Size 6 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 6 mo

Carter's

Size 6 mo
$9.99 $41

$5.99 40% off with

Egg by Susan Lazar Size 6 mo
Egg by Susan Lazar Size 6 mo
Price Drop BadgePrice Drop

View Product: Egg by Susan Lazar Size 6 mo

Egg by Susan Lazar

Size 6 mo
$7.99 $27

$6.39 20% off with

Puma Size 24 mo
Puma Size 24 mo
Price Drop BadgePrice Drop

View Product: Puma Size 24 mo

Puma

Size 24 mo
$6.99 $20
Carter's Size 12 mo
Carter's Size 12 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$8.99 $20

$6.29 30% off with

Zara Size 7
Zara Size 7
Price Drop BadgePrice Drop

View Product: Zara Size 7

Zara

Size 7
$10.99 $51

$6.59 40% off with

Assorted Brands Size 24 mo
Assorted Brands Size 24 mo
Price Drop BadgePrice Drop

View Product: Assorted Brands Size 24 mo

Assorted Brands

Size 24 mo
$9.99 $27

$5.99 40% off with

Jordan Size 2T
Jordan Size 2T
Price Drop BadgePrice Drop

View Product: Jordan Size 2T

Jordan

Size 2T
$13.99 $41

$6.99 50% off with

Gymboree Size 2T
Gymboree Size 2T

View Product: Gymboree Size 2T

Gymboree

Size 2T
$10.99 $20

$7.69 30% off with

Marvel Size 2T
Marvel Size 2T

View Product: Marvel Size 2T

Marvel

Size 2T
$10.99 $27

$7.69 30% off with

Nike Size Medium kids
Nike Size Medium kids

View Product: Nike Size Medium kids

Nike

Size Medium kids
$9.99 $25

$6.99 30% off with

Fila Size 3T
Fila Size 3T
Price Drop BadgePrice Drop

View Product: Fila Size 3T

Fila

Size 3T
$9.99 $32

$5.99 40% off with

Nike Size Small youth
Nike Size Small youth
Price Drop BadgePrice Drop

View Product: Nike Size Small youth

Nike

Size Small youth
$7.99 $38

$6.39 20% off with

The Children's Place Size 5
The Children's Place Size 5
Price Drop BadgePrice Drop

View Product: The Children's Place Size 5

The Children's Place

Size 5
$4.99 $30
OshKosh B'gosh Size 24 mo
OshKosh B'gosh Size 24 mo
Price Drop BadgePrice Drop

View Product: OshKosh B'gosh Size 24 mo

OshKosh B'gosh

Size 24 mo
$4.99 $22
Carter's Size 6
Carter's Size 6
Price Drop BadgePrice Drop

View Product: Carter's Size 6

Carter's

Size 6
$7.99 $41

$6.39 20% off with

Under Armour Size Medium youth
Under Armour Size Medium youth
Price Drop BadgePrice Drop

View Product: Under Armour Size Medium youth

Under Armour

Size Medium youth
$4.99 $38
Adidas Size Large youth
Adidas Size Large youth

View Product: Adidas Size Large youth

Adidas

Size Large youth
$8.99 $38

$7.19 20% off with

Adidas Size 2T
Adidas Size 2T

View Product: Adidas Size 2T

Adidas

Size 2T
$9.99 $34

$6.99 30% off with

Carter's Size 24 mo
Carter's Size 24 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 24 mo

Carter's

Size 24 mo
$6.99 $27
Old Navy Size 0-3 mo
Old Navy Size 0-3 mo
Price Drop BadgePrice Drop

View Product: Old Navy Size 0-3 mo

Old Navy

Size 0-3 mo
$10.99 $20

$6.59 40% off with

Carter's Size 18 mo
Carter's Size 18 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$9.99 $72

$5.99 40% off with

Nike Size Small youth
Nike Size Small youth
Price Drop BadgePrice Drop

View Product: Nike Size Small youth

Nike

Size Small youth
$9.99 $38

$5.99 40% off with

Gymboree Size 2T
Gymboree Size 2T
Price Drop BadgePrice Drop

View Product: Gymboree Size 2T

Gymboree

Size 2T
$7.99 $35

$6.39 20% off with

Nike Size Medium kids
Nike Size Medium kids

View Product: Nike Size Medium kids

Nike

Size Medium kids
$8.99 $25

$7.19 20% off with

Cat & Jack Size 8
Cat & Jack Size 8

View Product: Cat & Jack Size 8

Cat & Jack

Size 8
$4.99 $10
Cat & Jack Size 6
Cat & Jack Size 6

View Product: Cat & Jack Size 6

Cat & Jack

Size 6
$4.99 $10
Russell Athletic Size 10
Russell Athletic Size 10

View Product: Russell Athletic Size 10

Russell Athletic

Size 10
$6.99 $15
The Children's Place Size 5
The Children's Place Size 5

View Product: The Children's Place Size 5

The Children's Place

Size 5
$6.99 $18
Peek... Size 4
Peek... Size 4

View Product: Peek... Size 4

Peek...

Size 4
$11.99 $51

$9.59 20% off with

Nike Size 4T
Nike Size 4T

View Product: Nike Size 4T

Nike

Size 4T
$8.99 $32

$7.19 20% off with

Energy Zone Size 6
Energy Zone Size 6

View Product: Energy Zone Size 6

Energy Zone

Size 6
$4.99 $10
NBA Size Medium youth
NBA Size Medium youth

View Product: NBA Size Medium youth

NBA

Size Medium youth
$5.99 $15
Nike Size 4T
Nike Size 4T

View Product: Nike Size 4T

Nike

Size 4T
$8.99 $25

$7.19 20% off with

Gap Kids Size Medium youth
Gap Kids Size Medium youth

View Product: Gap Kids Size Medium youth

Gap Kids

Size Medium youth
$6.99 $20
Zara Kids Size 7
Zara Kids Size 7

View Product: Zara Kids Size 7

Zara Kids

Size 7
$13.99 $51

$11.19 20% off with

Baby Gap Size 6-12 mo
Baby Gap Size 6-12 mo

View Product: Baby Gap Size 6-12 mo

Baby Gap

Size 6-12 mo
$5.99 $18
Rockets of Awesome Size 10
Rockets of Awesome Size 10

View Product: Rockets of Awesome Size 10

Rockets of Awesome

Size 10
$6.99 $20
Jordan Size 2
Jordan Size 2

View Product: Jordan Size 2

Jordan

Size 2
$7.99 $27

$6.39 20% off with

Champion Size 7
Champion Size 7

View Product: Champion Size 7

Champion

Size 7
$5.99 $15
Circo Size 3T
Circo Size 3T

View Product: Circo Size 3T

Circo

Size 3T
$5.99 $13
Jumping Beans Size 7
Jumping Beans Size 7

View Product: Jumping Beans Size 7

Jumping Beans

Size 7
$6.99 $16
Under Armour Size Large youth
Under Armour Size Large youth

View Product: Under Armour Size Large youth

Under Armour

Size Large youth
$11.99 $26

$9.59 20% off with

Athletic Works Size 7
Athletic Works Size 7

View Product: Athletic Works Size 7

Athletic Works

Size 7
$4.99 $10
Colosseum Athletics Size 12-18 mo
Colosseum Athletics Size 12-18 mo

View Product: Colosseum Athletics Size 12-18 mo

Colosseum Athletics

Size 12-18 mo
$4.99 $20
Pro Player Size 10
Pro Player Size 10

View Product: Pro Player Size 10

Pro Player

Size 10
$6.99 $15
The Children's Place Size 4T
The Children's Place Size 4T

View Product: The Children's Place Size 4T

The Children's Place

Size 4T
$7.99 $25

$6.39 20% off with

Under Armour Size 18 mo
Under Armour Size 18 mo

View Product: Under Armour Size 18 mo

Under Armour

Size 18 mo
$10.99 $26

$8.79 20% off with

Gap Fit Size Large kids
Gap Fit Size Large kids

View Product: Gap Fit Size Large kids

Gap Fit

Size Large kids
$8.99 $26

$7.19 20% off with

Russell Athletic Size 10
Russell Athletic Size 10

View Product: Russell Athletic Size 10

Russell Athletic

Size 10
$8.99 $20

$7.19 20% off with

Rockets of Awesome Size 5
Rockets of Awesome Size 5
New With Tags BadgeNew With Tags

View Product: Rockets of Awesome Size 5

Rockets of Awesome

Size 5
$11.99 $34

$9.59 20% off with

Athletic Works Size X-Large youth
Athletic Works Size X-Large youth

View Product: Athletic Works Size X-Large youth

Athletic Works

Size X-Large youth
$6.99 $15
Athletic Works Size X-Large youth
Athletic Works Size X-Large youth

View Product: Athletic Works Size X-Large youth

Athletic Works

Size X-Large youth
$7.99 $15

$6.39 20% off with

Assorted Brands Size 5T
Assorted Brands Size 5T

View Product: Assorted Brands Size 5T

Assorted Brands

Size 5T
$8.99 $26

$7.19 20% off with

all in motion Size Large youth
all in motion Size Large youth

View Product: all in motion Size Large youth

all in motion

Size Large youth
$7.99 $15

$6.39 20% off with

Carter's Size 18 mo
Carter's Size 18 mo

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$7.99 $27

$6.39 20% off with

Gap Kids Size 3-6 mo
Gap Kids Size 3-6 mo

View Product: Gap Kids Size 3-6 mo

Gap Kids

Size 3-6 mo
$31.99 $88

$25.59 20% off with

OshKosh B'gosh Size 6
OshKosh B'gosh Size 6

View Product: OshKosh B'gosh Size 6

OshKosh B'gosh

Size 6
$6.99 $20
Under Armour Size Large youth
Under Armour Size Large youth

View Product: Under Armour Size Large youth

Under Armour

Size Large youth
$14.99 $26

$11.99 20% off with

Nike Size 8
Nike Size 8

View Product: Nike Size 8

Nike

Size 8
$11.99 $38

$9.59 20% off with

C9 By Champion Size 6
C9 By Champion Size 6

View Product: C9 By Champion Size 6

C9 By Champion

Size 6
$4.99 $10
Gap Kids Size 4
Gap Kids Size 4

View Product: Gap Kids Size 4

Gap Kids

Size 4
$8.99 $25

$7.19 20% off with

Assorted Brands Size Large youth
Assorted Brands Size Large youth

View Product: Assorted Brands Size Large youth

Assorted Brands

Size Large youth
$7.99 $20

$6.39 20% off with

Under Armour Size 6
Under Armour Size 6

View Product: Under Armour Size 6

Under Armour

Size 6
$11.99 $26

$9.59 20% off with

Athletic Works Size 14
Athletic Works Size 14

View Product: Athletic Works Size 14

Athletic Works

Size 14
$7.99 $15

$6.39 20% off with

Nike Size Medium kids
Nike Size Medium kids

View Product: Nike Size Medium kids

Nike

Size Medium kids
$8.99 $25

$7.19 20% off with

Old Navy Size 8
Old Navy Size 8

View Product: Old Navy Size 8

Old Navy

Size 8
$7.99 $20

$6.39 20% off with

Baby Gap Size 3-6 mo
Baby Gap Size 3-6 mo

View Product: Baby Gap Size 3-6 mo

Baby Gap

Size 3-6 mo
$10.99 $30

$8.79 20% off with

C9 By Champion Size 6
C9 By Champion Size 6

View Product: C9 By Champion Size 6

C9 By Champion

Size 6
$5.99 $10
Nike Size Medium youth
Nike Size Medium youth

View Product: Nike Size Medium youth

Nike

Size Medium youth
$10.99 $25

$8.79 20% off with

Carter's Size 18 mo
Carter's Size 18 mo

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$5.99 $20
C9 By Champion Size X-Large kids
C9 By Champion Size X-Large kids

View Product: C9 By Champion Size X-Large kids

C9 By Champion

Size X-Large kids
$5.99 $15
Marvel Size 7
Marvel Size 7

View Product: Marvel Size 7

Marvel

Size 7
$11.99 $31

$9.59 20% off with

Active by Old Navy Size 5
Active by Old Navy Size 5

View Product: Active by Old Navy Size 5

Active by Old Navy

Size 5
$5.99 $11
Heat Gear by Under Armour Size Small youth
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
$10.99 $31

$8.79 20% off with

Unbranded Size 3-6 mo
Unbranded Size 3-6 mo

View Product: Unbranded Size 3-6 mo

Unbranded

Size 3-6 mo
$7.99 $20

$6.39 20% off with

Cat & Jack Size Medium kids
Cat & Jack Size Medium kids

View Product: Cat & Jack Size Medium kids

Cat & Jack

Size Medium kids
$5.99 $10
PLACE Sport Size X-Large youth
PLACE Sport Size X-Large youth

View Product: PLACE Sport Size X-Large youth

PLACE Sport

Size X-Large youth
$6.99 $13
Heat Gear by Under Armour Size Medium youth
Heat Gear by Under Armour Size Medium youth

View Product: Heat Gear by Under Armour Size Medium youth

Heat Gear by Under Armour

Size Medium youth
$10.99 $31

$8.79 20% off with

Under Armour Size Small youth
Under Armour Size Small youth

View Product: Under Armour Size Small youth

Under Armour

Size Small youth
$11.99 $26

$9.59 20% off with

NBA Size 14
NBA Size 14
New With Tags BadgeNew With Tags

View Product: NBA Size 14

NBA

Size 14
$4.99 $15
Athletic Works Size 8
Athletic Works Size 8

View Product: Athletic Works Size 8

Athletic Works

Size 8
$4.99 $10
Baby Gap Size 4
Baby Gap Size 4

View Product: Baby Gap Size 4

Baby Gap

Size 4
$10.99 $18

$8.79 20% off with

PLACE Sport Size 14
PLACE Sport Size 14

View Product: PLACE Sport Size 14

PLACE Sport

Size 14
$7.99 $13

$6.39 20% off with

Adidas Size Large youth
Adidas Size Large youth

View Product: Adidas Size Large youth

Adidas

Size Large youth
$8.99 $26

$7.19 20% off with

Nike Size Large kids
Nike Size Large kids

View Product: Nike Size Large kids

Nike

Size Large kids
$11.99 $38

$9.59 20% off with

Nike Size 4T
Nike Size 4T

View Product: Nike Size 4T

Nike

Size 4T
$8.99 $25

$7.19 20% off with

AND1 Size 16
AND1 Size 16

View Product: AND1 Size 16

AND1

Size 16
$6.99 $10
Carter's Size 6 mo
Carter's Size 6 mo

View Product: Carter's Size 6 mo

Carter's

Size 6 mo
$5.99 $20
Under Armour Size Small youth
Under Armour Size Small youth

View Product: Under Armour Size Small youth

Under Armour

Size Small youth
$11.99 $26

$9.59 20% off with

The Children's Place Size 5
The Children's Place Size 5

View Product: The Children's Place Size 5

The Children's Place

Size 5
$6.99 $18
Adidas Size 10
Adidas Size 10

View Product: Adidas Size 10

Adidas

Size 10
$12.99 $38

$10.39 20% off with

Russell Athletic Size 10
Russell Athletic Size 10

View Product: Russell Athletic Size 10

Russell Athletic

Size 10
$6.99 $15
ZeroXposur Size 10
ZeroXposur Size 10

View Product: ZeroXposur Size 10

ZeroXposur

Size 10
$10.99 $38

$8.79 20% off with

Disney Store Size Small youth
Disney Store Size Small youth

View Product: Disney Store Size Small youth

Disney Store

Size Small youth
$10.99 $26

$8.79 20% off with

Umbro Size Medium youth
Umbro Size Medium youth

View Product: Umbro Size Medium youth

Umbro

Size Medium youth
$6.99 $15
Carter's Size 6 mo
Carter's Size 6 mo

View Product: Carter's Size 6 mo

Carter's

Size 6 mo
$6.99 $20
Active by Old Navy Size Medium youth
Active by Old Navy Size Medium youth
New With Tags BadgeNew With Tags

View Product: Active by Old Navy Size Medium youth

Active by Old Navy

Size Medium youth
$4.99 $9.99
Nike Size 2T
Nike Size 2T

View Product: Nike Size 2T

Nike

Size 2T
$7.99 $25

$6.39 20% off with

PLACE Sport Size 5
PLACE Sport Size 5

View Product: PLACE Sport Size 5

PLACE Sport

Size 5
$7.99 $11

$6.39 20% off with

Nike Golf Size Small kids
Nike Golf Size Small kids

View Product: Nike Golf Size Small kids

Nike Golf

Size Small kids
$9.99 $26

$7.99 20% off with

Free Country Size 3T
Free Country Size 3T

View Product: Free Country Size 3T

Free Country

Size 3T
$6.99 $17
Rene Rofe Size 0-3 mo
Rene Rofe Size 0-3 mo

View Product: Rene Rofe Size 0-3 mo

Rene Rofe

Size 0-3 mo
$5.99 $16
Old Navy Size Medium infants
Old Navy Size Medium infants

View Product: Old Navy Size Medium infants

Old Navy

Size Medium infants
$6.99 $11
Spotted Zebra Size 5
Spotted Zebra Size 5

View Product: Spotted Zebra Size 5

Spotted Zebra

Size 5
$7.99 $26

$6.39 20% off with

Assorted Brands Size Medium youth
Assorted Brands Size Medium youth

View Product: Assorted Brands Size Medium youth

Assorted Brands

Size Medium youth
$7.99 $20

$6.39 20% off with

Athletic Works Size 10
Athletic Works Size 10

View Product: Athletic Works Size 10

Athletic Works

Size 10
$5.99 $10
Puma Size 10
Puma Size 10

View Product: Puma Size 10

Puma

Size 10
$8.99 $20

$7.19 20% off with

Rockets of Awesome Size 14
Rockets of Awesome Size 14
New With Tags BadgeNew With Tags

View Product: Rockets of Awesome Size 14

Rockets of Awesome

Size 14
$10.99 $31

$8.79 20% off with

OshKosh B'gosh Size 12 mo
OshKosh B'gosh Size 12 mo

View Product: OshKosh B'gosh Size 12 mo

OshKosh B'gosh

Size 12 mo
$10.99 $27

$8.79 20% off with

Polo by Ralph Lauren Size 2T
Polo by Ralph Lauren Size 2T

View Product: Polo by Ralph Lauren Size 2T

Polo by Ralph Lauren

Size 2T
$11.99 $34

$9.59 20% off with

Under Armour Size 7
Under Armour Size 7

View Product: Under Armour Size 7

Under Armour

Size 7
$10.99 $26

$8.79 20% off with

Athletic Works Size 10
Athletic Works Size 10

View Product: Athletic Works Size 10

Athletic Works

Size 10
$6.99 $15
Carter's Size 12 mo
Carter's Size 12 mo

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$5.99 $20
Adidas Size 14
Adidas Size 14

View Product: Adidas Size 14

Adidas

Size 14
$11.99 $38

$9.59 20% off with

H&M Size 4
H&M Size 4

View Product: H&M Size 4

H&M

Size 4
$9.99 $26

$7.99 20% off with

Nike Size 4T
Nike Size 4T

View Product: Nike Size 4T

Nike

Size 4T
$6.99 $25
Polo by Ralph Lauren Size 2T
Polo by Ralph Lauren Size 2T

View Product: Polo by Ralph Lauren Size 2T

Polo by Ralph Lauren

Size 2T
$11.99 $34

$9.59 20% off with

Baby Gap Size 18-24 mo
Baby Gap Size 18-24 mo

View Product: Baby Gap Size 18-24 mo

Baby Gap

Size 18-24 mo
$8.99 $30

$7.19 20% off with

Nike Size 4
Nike Size 4

View Product: Nike Size 4

Nike

Size 4
$8.99 $25

$7.19 20% off with

...