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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.

23,751 items
Nike Size Large youth
Nike Size Large youth

View Product: Nike Size Large youth

Nike

Size Large youth
$10.99 $25
Under Armour Size 6
Under Armour Size 6

View Product: Under Armour Size 6

Under Armour

Size 6
$15.99 $38
H&M Size 2
H&M Size 2

View Product: H&M Size 2

H&M

Size 2
$8.99 $20
Russell Athletic Size 18
Russell Athletic Size 18

View Product: Russell Athletic Size 18

Russell Athletic

Size 18
$15.99 $36

$11.19 30% off with

Lands' End Size 10
Lands' End Size 10
Price Drop BadgePrice Drop

View Product: Lands' End Size 10

Lands' End

Size 10
$6.99 $71
Under Armour Size Small youth
Under Armour Size Small youth
Price Drop BadgePrice Drop

View Product: Under Armour Size Small youth

Under Armour

Size Small youth
$7.99 $26

$6.39 20% off with

Ralph Lauren Size 12 mo
Ralph Lauren Size 12 mo

View Product: Ralph Lauren Size 12 mo

Ralph Lauren

Size 12 mo
$11.99 $41

$8.39 30% off with

Nike Size X-Large kids
Nike Size X-Large kids

View Product: Nike Size X-Large kids

Nike

Size X-Large kids
$9.99 $38

$6.99 30% off with

ODIN & IVY Size 14
ODIN & IVY Size 14

View Product: ODIN & IVY Size 14

ODIN & IVY

Size 14
$10.99 $31

$7.69 30% off with

Nike Size 2T
Nike Size 2T

View Product: Nike Size 2T

Nike

Size 2T
$9.99 $34

$6.99 30% off with

Jumping Beans Size 6
Jumping Beans Size 6
Price Drop BadgePrice Drop

View Product: Jumping Beans Size 6

Jumping Beans

Size 6
$3.99 $16
Carter's Size Small youth
Carter's Size Small youth
Price Drop BadgePrice Drop

View Product: Carter's Size Small youth

Carter's

Size Small youth
$4.99 $41
New Balance Size 4
New Balance Size 4
Price Drop BadgePrice Drop

View Product: New Balance Size 4

New Balance

Size 4
$3.99 $38
Polo by Ralph Lauren Size 3
Polo by Ralph Lauren Size 3
Price Drop BadgePrice Drop

View Product: Polo by Ralph Lauren Size 3

Polo by Ralph Lauren

Size 3
$12.99 $43

$7.79 40% off with

Athletech Size 8
Athletech Size 8
Price Drop BadgePrice Drop

View Product: Athletech Size 8

Athletech

Size 8
$3.99 $15
Athletech Size 8
Athletech Size 8
Price Drop BadgePrice Drop

View Product: Athletech Size 8

Athletech

Size 8
$3.99 $15
Miniclasix Size 12-18 mo
Miniclasix Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Miniclasix Size 12-18 mo

Miniclasix

Size 12-18 mo
$5.99 $82
Nike Size Medium youth
Nike Size Medium youth
Price Drop BadgePrice Drop

View Product: Nike Size Medium youth

Nike

Size Medium youth
$3.99 $38
Active by Old Navy Size 8
Active by Old Navy Size 8

View Product: Active by Old Navy Size 8

Active by Old Navy

Size 8
$5.99 $13
Tek Gear Size 14
Tek Gear Size 14

View Product: Tek Gear Size 14

Tek Gear

Size 14
$7.99 $23

$6.39 20% off with

Cat & Jack Size 16
Cat & Jack Size 16

View Product: Cat & Jack Size 16

Cat & Jack

Size 16
$8.99 $20

$7.19 20% off with

Columbia Size 8
Columbia Size 8

View Product: Columbia Size 8

Columbia

Size 8
$7.99 $20

$6.39 20% off with

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
Genuine Kids from Oshkosh Size 12 mo
Genuine Kids from Oshkosh Size 12 mo

View Product: Genuine Kids from Oshkosh Size 12 mo

Genuine Kids from Oshkosh

Size 12 mo
$5.99 $15
Carter's Size 9 mo
Carter's Size 9 mo

View Product: Carter's Size 9 mo

Carter's

Size 9 mo
$6.99 $27
Champion Size Medium youth
Champion Size Medium youth

View Product: Champion Size Medium youth

Champion

Size Medium youth
$5.99 $15
Tommy Hilfiger Size 2T
Tommy Hilfiger Size 2T

View Product: Tommy Hilfiger Size 2T

Tommy Hilfiger

Size 2T
$8.99 $34

$7.19 20% off with

Tek Gear Size 14
Tek Gear Size 14

View Product: Tek Gear Size 14

Tek Gear

Size 14
$5.99 $15
Uniqlo Size 11
Uniqlo Size 11

View Product: Uniqlo Size 11

Uniqlo

Size 11
$8.99 $23

$7.19 20% off with

Nike Size Small youth
Nike Size Small youth

View Product: Nike Size Small youth

Nike

Size Small youth
$14.99 $38

$11.99 20% off with

Champion Size Medium youth
Champion Size Medium youth

View Product: Champion Size Medium youth

Champion

Size Medium youth
$6.99 $15
Assorted Brands Size 8
Assorted Brands Size 8

View Product: Assorted Brands Size 8

Assorted Brands

Size 8
$6.99 $20
Nike Size 3 mo
Nike Size 3 mo

View Product: Nike Size 3 mo

Nike

Size 3 mo
$9.99 $26

$7.99 20% off with

Carter's Size 3 mo
Carter's Size 3 mo

View Product: Carter's Size 3 mo

Carter's

Size 3 mo
$6.99 $27
Xersion Size 5T
Xersion Size 5T

View Product: Xersion Size 5T

Xersion

Size 5T
$4.99 $13
Art Class Size 14
Art Class Size 14

View Product: Art Class Size 14

Art Class

Size 14
$6.99 $13
OshKosh B'gosh Size 5
OshKosh B'gosh Size 5

View Product: OshKosh B'gosh Size 5

OshKosh B'gosh

Size 5
$6.99 $20
Puma Size 10
Puma Size 10

View Product: Puma Size 10

Puma

Size 10
$6.99 $20
Active by Old Navy Size 8
Active by Old Navy Size 8

View Product: Active by Old Navy Size 8

Active by Old Navy

Size 8
$7.99 $19

$6.39 20% off with

Active by Old Navy Size 10
Active by Old Navy Size 10

View Product: Active by Old Navy Size 10

Active by Old Navy

Size 10
$5.99 $13
Assorted Brands Size 10
Assorted Brands Size 10

View Product: Assorted Brands Size 10

Assorted Brands

Size 10
$6.99 $20
Russell Athletic Size Medium youth
Russell Athletic Size Medium youth

View Product: Russell Athletic Size Medium youth

Russell Athletic

Size Medium youth
$5.99 $10
Tek Gear Size 14
Tek Gear Size 14

View Product: Tek Gear Size 14

Tek Gear

Size 14
$7.99 $23

$6.39 20% off with

Hanes Size Small kids
Hanes Size Small kids

View Product: Hanes Size Small kids

Hanes

Size Small kids
$7.99 $17

$6.39 20% off with

Despicable Me Size 10
Despicable Me Size 10

View Product: Despicable Me Size 10

Despicable Me

Size 10
$5.99 $10
Sport-Tek Size Large youth
Sport-Tek Size Large youth

View Product: Sport-Tek Size Large youth

Sport-Tek

Size Large youth
$4.99 $15
Active by Old Navy Size 10
Active by Old Navy Size 10
New With Tags BadgeNew With Tags

View Product: Active by Old Navy Size 10

Active by Old Navy

Size 10
$5.99 $12.94
Tek Gear Size 10
Tek Gear Size 10

View Product: Tek Gear Size 10

Tek Gear

Size 10
$10.99 $23

$8.79 20% off with

Nike Size 24 mo
Nike Size 24 mo

View Product: Nike Size 24 mo

Nike

Size 24 mo
$7.99 $26

$6.39 20% off with

C9 By Champion Size Large youth
C9 By Champion Size Large youth

View Product: C9 By Champion Size Large youth

C9 By Champion

Size Large youth
$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
$7.99 $27

$6.39 20% off with

Carter's Size 5T
Carter's Size 5T

View Product: Carter's Size 5T

Carter's

Size 5T
$8.99 $28

$7.19 20% off with

Athletic Works Size 14
Athletic Works Size 14

View Product: Athletic Works Size 14

Athletic Works

Size 14
$5.99 $10
Adidas Size 10
Adidas Size 10

View Product: Adidas Size 10

Adidas

Size 10
$8.99 $26

$7.19 20% off with

Champion Size 4T
Champion Size 4T

View Product: Champion Size 4T

Champion

Size 4T
$4.99 $13
Assorted Brands Size 7
Assorted Brands Size 7

View Product: Assorted Brands Size 7

Assorted Brands

Size 7
$6.99 $20
Umbro Size 4
Umbro Size 4

View Product: Umbro Size 4

Umbro

Size 4
$7.99 $13

$6.39 20% off with

all in motion Size X-Large youth
all in motion Size X-Large youth

View Product: all in motion Size X-Large youth

all in motion

Size X-Large youth
$4.99 $10
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
$6.99 $18
Carter's Size 12 mo
Carter's Size 12 mo

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$5.99 $27
Cat & Jack Size 12 mo
Cat & Jack Size 12 mo

View Product: Cat & Jack Size 12 mo

Cat & Jack

Size 12 mo
$5.99 $10
Unbranded Size Large youth
Unbranded Size Large youth

View Product: Unbranded Size Large youth

Unbranded

Size Large youth
$6.99 $20
Wilson Size X-Small youth
Wilson Size X-Small youth

View Product: Wilson Size X-Small youth

Wilson

Size X-Small youth
$7.99 $10

$6.39 20% off with

Obermeyer Size 16 Husky
Obermeyer Size 16 Husky

View Product: Obermeyer Size 16 Husky

Obermeyer

Size 16 Husky
$24.99 $90

$19.99 20% off with

Active by Old Navy Size 18
Active by Old Navy Size 18

View Product: Active by Old Navy Size 18

Active by Old Navy

Size 18
$7.99 $19

$6.39 20% off with

C9 By Champion Size 12
C9 By Champion Size 12

View Product: C9 By Champion Size 12

C9 By Champion

Size 12
$4.99 $15
Assorted Brands Size 3T
Assorted Brands Size 3T

View Product: Assorted Brands Size 3T

Assorted Brands

Size 3T
$10.99 $34

$8.79 20% off with

Heat Gear by Under Armour Size X-Small youth
Heat Gear by Under Armour Size X-Small youth

View Product: Heat Gear by Under Armour Size X-Small youth

Heat Gear by Under Armour

Size X-Small youth
$12.99 $31

$10.39 20% off with

Easton Size Large youth
Easton Size Large youth
New With Tags BadgeNew With Tags

View Product: Easton Size Large youth

Easton

Size Large youth
$4.99 $9.97
Nike Size 3
Nike Size 3

View Product: Nike Size 3

Nike

Size 3
$8.99 $25

$7.19 20% off with

Rorie Whelan Size 4T
Rorie Whelan Size 4T

View Product: Rorie Whelan Size 4T

Rorie Whelan

Size 4T
$7.99 $21

$6.39 20% off with

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
Just One Year by Carter's Size 6 mo
Just One Year by Carter's Size 6 mo

View Product: Just One Year by Carter's Size 6 mo

Just One Year by Carter's

Size 6 mo
$4.99 $10
Joe Fresh Size 3-6 mo
Joe Fresh Size 3-6 mo

View Product: Joe Fresh Size 3-6 mo

Joe Fresh

Size 3-6 mo
$5.99 $15
Team Athletics Size 4T
Team Athletics Size 4T

View Product: Team Athletics Size 4T

Team Athletics

Size 4T
$6.99 $17
Xersion Size Large youth
Xersion Size Large youth

View Product: Xersion Size Large youth

Xersion

Size Large youth
$8.99 $23

$7.19 20% off with

The Children's Place Size 2T
The Children's Place Size 2T

View Product: The Children's Place Size 2T

The Children's Place

Size 2T
$5.99 $17
Under Armour Size 7
Under Armour Size 7

View Product: Under Armour Size 7

Under Armour

Size 7
$12.99 $26

$10.39 20% off with

Unbranded Size 9-12 mo
Unbranded Size 9-12 mo

View Product: Unbranded Size 9-12 mo

Unbranded

Size 9-12 mo
$6.99 $20
Unbranded Size 80 cm
Unbranded Size 80 cm

View Product: Unbranded Size 80 cm

Unbranded

Size 80 cm
$8.99 $27

$7.19 20% off with

Nike Size 6
Nike Size 6

View Product: Nike Size 6

Nike

Size 6
$8.99 $25

$7.19 20% off with

Gymboree Size 6-12 mo
Gymboree Size 6-12 mo

View Product: Gymboree Size 6-12 mo

Gymboree

Size 6-12 mo
$5.99 $18
Gap Fit Size 2
Gap Fit Size 2

View Product: Gap Fit Size 2

Gap Fit

Size 2
$7.99 $26

$6.39 20% off with

Marvel Size 5
Marvel Size 5

View Product: Marvel Size 5

Marvel

Size 5
$6.99 $17
Gymboree Size 2T
Gymboree Size 2T

View Product: Gymboree Size 2T

Gymboree

Size 2T
$8.99 $35

$7.19 20% off with

Athletic Works Size 6
Athletic Works Size 6

View Product: Athletic Works Size 6

Athletic Works

Size 6
$4.99 $10
Tek Gear Size Large youth
Tek Gear Size Large youth

View Product: Tek Gear Size Large youth

Tek Gear

Size Large youth
$8.99 $23

$7.19 20% off with

Active by Old Navy Size 10
Active by Old Navy Size 10

View Product: Active by Old Navy Size 10

Active by Old Navy

Size 10
$7.99 $19

$6.39 20% off with

Russell Athletic Size 8
Russell Athletic Size 8

View Product: Russell Athletic Size 8

Russell Athletic

Size 8
$7.99 $20

$6.39 20% off with

Polo by Ralph Lauren Size 10
Polo by Ralph Lauren Size 10

View Product: Polo by Ralph Lauren Size 10

Polo by Ralph Lauren

Size 10
$13.99 $51

$11.19 20% off with

First Impressions Size 3-6 mo
First Impressions Size 3-6 mo

View Product: First Impressions Size 3-6 mo

First Impressions

Size 3-6 mo
$7.99 $34

$6.39 20% off with

Boy Scouts of America Size Large youth
Boy Scouts of America Size Large youth

View Product: Boy Scouts of America Size Large youth

Boy Scouts of America

Size Large youth
$6.99 $15
PLACE Sport Size 4T
PLACE Sport Size 4T

View Product: PLACE Sport Size 4T

PLACE Sport

Size 4T
$4.99 $11
JACK Size 4
JACK Size 4

View Product: JACK Size 4

JACK

Size 4
$5.99 $13
Nike Size Small youth
Nike Size Small youth

View Product: Nike Size Small youth

Nike

Size Small youth
$16.99 $51

$13.59 20% off with

Nike Size 4T
Nike Size 4T

View Product: Nike Size 4T

Nike

Size 4T
$7.99 $25

$6.39 20% off with

Gymboree Size 6-12 mo
Gymboree Size 6-12 mo

View Product: Gymboree Size 6-12 mo

Gymboree

Size 6-12 mo
$7.99 $27

$6.39 20% off with

Energy Zone Size Large youth
Energy Zone Size Large youth

View Product: Energy Zone Size Large youth

Energy Zone

Size Large youth
$6.99 $10
Adidas Size 7
Adidas Size 7

View Product: Adidas Size 7

Adidas

Size 7
$8.99 $26

$7.19 20% off with

Jumping Beans Size 4T
Jumping Beans Size 4T

View Product: Jumping Beans Size 4T

Jumping Beans

Size 4T
$5.99 $16
Carter's Size 3T
Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$8.99 $28

$7.19 20% off with

Nike Size 2
Nike Size 2

View Product: Nike Size 2

Nike

Size 2
$9.99 $25

$7.99 20% off with

all in motion Size 4
all in motion Size 4

View Product: all in motion Size 4

all in motion

Size 4
$6.99 $13
Fagottino Size 12-18 mo
Fagottino Size 12-18 mo

View Product: Fagottino Size 12-18 mo

Fagottino

Size 12-18 mo
$5.99 $15
Adidas Size 11
Adidas Size 11

View Product: Adidas Size 11

Adidas

Size 11
$15.99 $38

$12.79 20% off with

C9 By Champion Size Small kids
C9 By Champion Size Small kids

View Product: C9 By Champion Size Small kids

C9 By Champion

Size Small kids
$6.99 $9
C9 By Champion Size 8
C9 By Champion Size 8

View Product: C9 By Champion Size 8

C9 By Champion

Size 8
$7.99 $20

$6.39 20% off with

Kapital K Size 18 mo
Kapital K Size 18 mo

View Product: Kapital K Size 18 mo

Kapital K

Size 18 mo
$6.99 $15
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
Athletic Works Size Medium youth
Athletic Works Size Medium youth

View Product: Athletic Works Size Medium youth

Athletic Works

Size Medium youth
$6.99 $10
Rawik Size 5
Rawik Size 5

View Product: Rawik Size 5

Rawik

Size 5
$18.99 $51

$15.19 20% off with

OshKosh B'gosh Size 5T
OshKosh B'gosh Size 5T

View Product: OshKosh B'gosh Size 5T

OshKosh B'gosh

Size 5T
$10.99 $34

$8.79 20% off with

Athletic Works Size Medium youth
Athletic Works Size Medium youth

View Product: Athletic Works Size Medium youth

Athletic Works

Size Medium youth
$6.99 $10
Carter's Size 9 mo
Carter's Size 9 mo

View Product: Carter's Size 9 mo

Carter's

Size 9 mo
$7.99 $27

$6.39 20% off with

7 For All Mankind Size 3-6 mo
7 For All Mankind Size 3-6 mo

View Product: 7 For All Mankind Size 3-6 mo

7 For All Mankind

Size 3-6 mo
$9.99 $31

$7.99 20% off with

Adidas Size 5
Adidas Size 5

View Product: Adidas Size 5

Adidas

Size 5
$10.99 $32

$8.79 20% off with

Nike Size 6 mo
Nike Size 6 mo

View Product: Nike Size 6 mo

Nike

Size 6 mo
$13.99 $26

$11.19 20% off with

Janie and Jack Size 2T
Janie and Jack Size 2T
New With Tags BadgeNew With Tags

View Product: Janie and Jack Size 2T

Janie and Jack

Size 2T
$7.99 $26

$6.39 20% off with

Gap Kids Size 10
Gap Kids Size 10

View Product: Gap Kids Size 10

Gap Kids

Size 10
$10.99 $25

$8.79 20% off with

...