About
ThredUp LogoThredUp
Shop
SellCleanout animation
Beta
My ThredUp
Account
0

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.

PolyesterRemove filter6-9 moRemove filter20Remove filter
74 items
Sort by:
    Hanna Andersson Zip Up Hoodie (view 2)Hanna Andersson Zip Up Hoodie (view 1)
    View Product: Hanna Andersson Zip Up Hoodie

    Hanna Andersson

    Zip Up Hoodie
    Size 6-9 mo
    $26.99 $14.84 45% off with code GOBIG
    54% off estimated retail
    Faded Glory One Piece Snowsuit (view 2)Faded Glory One Piece Snowsuit (view 1)
    View Product: Faded Glory One Piece Snowsuit

    Faded Glory

    One Piece Snowsuit
    Size 6-9 mo
    $13.99 $7.69 45% off with code GOBIG
    31% off estimated retail
    Nike Pullover Hoodie (view 2)Nike Pullover Hoodie (view 1)
    View Product: Nike Pullover Hoodie

    Nike

    Pullover Hoodie
    Size 6-9 mo
    $16.99 $9.34 45% off with code GOBIG
    63% off estimated retail
    Zara Sweatpants (view 2)Zara Sweatpants (view 1)
    View Product: Zara Sweatpants

    Zara

    Sweatpants
    Size 6-9 mo
    $12.99 $7.14 45% off with code GOBIG
    45% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Hatley One Piece Snowsuit (view 2)Hatley One Piece Snowsuit (view 1)
    View Product: Hatley One Piece Snowsuit

    Hatley

    One Piece Snowsuit
    Size 6-9 mo
    $24.99 $13.74 45% off with code GOBIG
    58% off estimated retail
    Nike Active Pants (view 2)Nike Active Pants (view 1)
    View Product: Nike Active Pants

    Nike

    Active Pants
    Size 6-9 mo
    $8.99 $4.94 45% off with code GOBIG
    55% off estimated retail
    Sesame Street Zip Up Hoodie (view 2)Sesame Street Zip Up Hoodie (view 1)
    View Product: Sesame Street Zip Up Hoodie

    Sesame Street

    Zip Up Hoodie
    Size 6-9 mo
    $15.99 $8.79 45% off with code GOBIG
    40% off estimated retail
    Zara Baby Sweatpants (view 2)Zara Baby Sweatpants (view 1)
    View Product: Zara Baby Sweatpants

    Zara Baby

    Sweatpants
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    54% off estimated retail
    First Impressions Zip Up Hoodie (view 2)First Impressions Zip Up Hoodie (view 1)
    View Product: First Impressions Zip Up Hoodie

    First Impressions

    Zip Up Hoodie
    Size 6-9 mo
    $16.99 $9.34 45% off with code GOBIG
    61% off estimated retail
    Timberland Sweatpants (view 2)Timberland Sweatpants (view 1)
    View Product: Timberland Sweatpants

    Timberland

    Sweatpants
    Size 6-9 mo
    $13.99 $7.69 45% off with code GOBIG
    68% off estimated retail
    Under Armour Sweatpants (view 2)Under Armour Sweatpants (view 1)
    View Product: Under Armour Sweatpants

    Under Armour

    Sweatpants
    Size 6-9 mo
    $16.99 $9.34 45% off with code GOBIG
    48% off estimated retail
    Walmart Sweatpants (view 2)Walmart Sweatpants (view 1)
    View Product: Walmart Sweatpants

    Walmart

    Sweatpants
    Size 6-9 mo
    $9.99 $5.49 45% off with code GOBIG
    18% off estimated retail
    Under Armour Sweatpants (view 2)Under Armour Sweatpants (view 1)
    View Product: Under Armour Sweatpants

    Under Armour

    Sweatpants
    Size 6-9 mo
    $13.99 $7.69 45% off with code GOBIG
    55% off estimated retail
    Pagelaurenbaby baby Sweatpants (view 2)Pagelaurenbaby baby Sweatpants (view 1)
    View Product: Pagelaurenbaby baby Sweatpants

    Pagelaurenbaby baby

    Sweatpants
    Size 6-9 mo
    $10.99 $6.04 45% off with code GOBIG
    $11
    Under Armour Active T-Shirt (view 2)Under Armour Active T-Shirt (view 1)
    View Product: Under Armour Active T-Shirt

    Under Armour

    Active T-Shirt
    Size 6-9 mo
    $12.99 $7.14 45% off with code GOBIG
    59% off estimated retail
    Little Joule Zip Up Hoodie (view 2)Little Joule Zip Up Hoodie (view 1)
    View Product: Little Joule Zip Up Hoodie

    Little Joule

    Zip Up Hoodie
    Size 6-9 mo
    $17.99 $9.89 45% off with code GOBIG
    44% off estimated retail
    7 For All Mankind Sweatpants (view 2)7 For All Mankind Sweatpants (view 1)
    View Product: 7 For All Mankind Sweatpants

    7 For All Mankind

    Sweatpants
    Size 6-9 mo
    $9.99 $5.49 45% off with code GOBIG
    72% off estimated retail
    Emily and Oliver Sweatpants (view 2)Emily and Oliver Sweatpants (view 1)
    View Product: Emily and Oliver Sweatpants

    Emily and Oliver

    Sweatpants
    Size 6-9 mo
    $7.99 $4.39 45% off with code GOBIG
    50% off estimated retail
    Under Armour Track Jacket (view 2)Under Armour Track Jacket (view 1)
    View Product: Under Armour Track Jacket

    Under Armour

    Track Jacket
    Size 6-9 mo
    $12.99 $7.14 45% off with code GOBIG
    59% off estimated retail
    Star Wars Pullover Hoodie (view 2)Star Wars Pullover Hoodie (view 1)
    View Product: Star Wars Pullover Hoodie

    Star Wars

    Pullover Hoodie
    Size 6-9 mo
    $13.99 $7.69 45% off with code GOBIG
    20% off estimated retail
    Hanna Andersson Pullover Hoodie (view 2)Hanna Andersson Pullover Hoodie (view 1)
    View Product: Hanna Andersson Pullover Hoodie

    Hanna Andersson

    Pullover Hoodie
    Size 20
    $25.99 $14.29 45% off with code GOBIG
    48% off estimated retail
    Puma Track Pants (view 2)Puma Track Pants (view 1)
    View Product: Puma Track Pants

    Puma

    Track Pants
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    54% off estimated retail
    Tommy Hilfiger Zip Up Hoodie (view 2)Tommy Hilfiger Zip Up Hoodie (view 1)Price Drop
    View Product: Tommy Hilfiger Zip Up Hoodie

    Tommy Hilfiger

    Zip Up Hoodie
    Size 6-9 mo
    $12.99 $7.14 45% off with code GOBIG
    69% off estimated retail
    Under Armour Zip Up Hoodie (view 2)Under Armour Zip Up Hoodie (view 1)Price Drop
    View Product: Under Armour Zip Up Hoodie

    Under Armour

    Zip Up Hoodie
    Size 6-9 mo
    $18.99 $10.44 45% off with code GOBIG
    55% off estimated retail
    Assorted Brands Pullover Hoodie (view 2)Assorted Brands Pullover Hoodie (view 1)Price Drop
    View Product: Assorted Brands Pullover Hoodie

    Assorted Brands

    Pullover Hoodie
    Size 6-9 mo
    $13.99 $7.69 45% off with code GOBIG
    58% off estimated retail
    Reebok Track Pants (view 2)Reebok Track Pants (view 1)Price Drop
    View Product: Reebok Track Pants

    Reebok

    Track Pants
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    66% off estimated retail
    Nike Sweatpants (view 2)Nike Sweatpants (view 1)Price Drop
    View Product: Nike Sweatpants

    Nike

    Sweatpants
    Size 6-9 mo
    $15.99 $8.79 45% off with code GOBIG
    51% off estimated retail
    Star Wars Sweatpants (view 2)Star Wars Sweatpants (view 1)Price Drop
    View Product: Star Wars Sweatpants

    Star Wars

    Sweatpants
    Size 6-9 mo
    $10.99 $6.04 45% off with code GOBIG
    18% off estimated retail
    The Children's Place Zip Up Hoodie (view 2)The Children's Place Zip Up Hoodie (view 1)Price Drop
    View Product: The Children's Place Zip Up Hoodie

    The Children's Place

    Zip Up Hoodie
    Size 6-9 mo
    $12.99 $7.14 45% off with code GOBIG
    63% off estimated retail
    Star Wars Sweatpants (view 2)Star Wars Sweatpants (view 1)Price Drop
    View Product: Star Wars Sweatpants

    Star Wars

    Sweatpants
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    $11
    OshKosh B'gosh Zip Up Hoodie (view 2)OshKosh B'gosh Zip Up Hoodie (view 1)Price Drop
    View Product: OshKosh B'gosh Zip Up Hoodie

    OshKosh B'gosh

    Zip Up Hoodie
    Size 6-9 mo
    $13.99 $7.69 45% off with code GOBIG
    58% off estimated retail
    Puma Track Jacket (view 2)Puma Track Jacket (view 1)Price Drop
    View Product: Puma Track Jacket

    Puma

    Track Jacket
    Size 6-9 mo
    $12.99 $7.14 45% off with code GOBIG
    50% off estimated retail
    Puma Sweatpants (view 2)Puma Sweatpants (view 1)Price Drop
    View Product: Puma Sweatpants

    Puma

    Sweatpants
    Size 6-9 mo
    $13.99 $7.69 45% off with code GOBIG
    54% off estimated retail
    Unbranded Sweatpants (view 2)Unbranded Sweatpants (view 1)Price Drop
    View Product: Unbranded Sweatpants

    Unbranded

    Sweatpants
    Size 6-9 mo
    $13.99 $7.69 45% off with code GOBIG
    45% off estimated retail
    Puma Track Pants (view 2)Puma Track Pants (view 1)Price Drop
    View Product: Puma Track Pants

    Puma

    Track Pants
    Size 6-9 mo
    $10.99 $6.04 45% off with code GOBIG
    59% off estimated retail
    Puma Active Pants (view 2)Puma Active Pants (view 1)Price Drop
    View Product: Puma Active Pants

    Puma

    Active Pants
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    33% off estimated retail
    OshKosh B'gosh Zip Up Hoodie (view 2)OshKosh B'gosh Zip Up Hoodie (view 1)Price Drop
    View Product: OshKosh B'gosh Zip Up Hoodie

    OshKosh B'gosh

    Zip Up Hoodie
    Size 6-9 mo
    $14.24 $7.83 45% off with code GOBIG
    72% off estimated retail
    Beetle & Thread Sweatpants (view 2)Beetle & Thread Sweatpants (view 1)Price Drop
    View Product: Beetle & Thread Sweatpants

    Beetle & Thread

    Sweatpants
    Size 6-9 mo
    $9.99 $5.49 45% off with code GOBIG
    59% off estimated retail
    Lullaby Land Sweatpants (view 2)Lullaby Land Sweatpants (view 1)Price Drop
    View Product: Lullaby Land Sweatpants

    Lullaby Land

    Sweatpants
    Size 6-9 mo
    $9.99 $5.49 45% off with code GOBIG
    18% off estimated retail
    Team Sweatpants (view 2)Team Sweatpants (view 1)Price Drop
    View Product: Team Sweatpants

    Team

    Sweatpants
    Size 6-9 mo
    $12.99 $7.14 45% off with code GOBIG
    31% off estimated retail
    Athletic Works Sweatpants (view 2)Athletic Works Sweatpants (view 1)Price Drop
    View Product: Athletic Works Sweatpants

    Athletic Works

    Sweatpants
    Size 6-9 mo
    $10.99 $6.04 45% off with code GOBIG
    18% off estimated retail
    Puma Fleece Pants (view 2)Puma Fleece Pants (view 1)Price Drop
    View Product: Puma Fleece Pants

    Puma

    Fleece Pants
    Size 6-9 mo
    $12.24 $6.73 45% off with code GOBIG
    59% off estimated retail
    Puma Track Jacket (view 2)Puma Track Jacket (view 1)Price Drop
    View Product: Puma Track Jacket

    Puma

    Track Jacket
    Size 6-9 mo
    $16.24 $8.93 45% off with code GOBIG
    54% off estimated retail
    Puma Zip Up Hoodie (view 2)Puma Zip Up Hoodie (view 1)Price Drop
    View Product: Puma Zip Up Hoodie

    Puma

    Zip Up Hoodie
    Size 6-9 mo
    $11.24 $6.18 45% off with code GOBIG
    69% off estimated retail
    Emporio Baby Fleece Pants (view 2)Emporio Baby Fleece Pants (view 1)Price Drop
    View Product: Emporio Baby Fleece Pants

    Emporio Baby

    Fleece Pants
    Size 6-9 mo
    $8.99 $4.94 45% off with code GOBIG
    27% off estimated retail
    Grayson Mini Sweatpants (view 2)Grayson Mini Sweatpants (view 1)Price Drop
    View Product: Grayson Mini Sweatpants

    Grayson Mini

    Sweatpants
    Size 6-9 mo
    $12.99 $7.14 45% off with code GOBIG
    31% off estimated retail
    Nike Athletic Shorts (view 2)Nike Athletic Shorts (view 1)Price Drop
    View Product: Nike Athletic Shorts

    Nike

    Athletic Shorts
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    63% off estimated retail
    Quiltex Sweatpants (view 2)Quiltex Sweatpants (view 1)Price Drop
    View Product: Quiltex Sweatpants

    Quiltex

    Sweatpants
    Size 6-9 mo
    $9.99 $5.49 45% off with code GOBIG
    18% off estimated retail
    Rene Rofe Sweatpants (view 2)Rene Rofe Sweatpants (view 1)Price Drop
    View Product: Rene Rofe Sweatpants

    Rene Rofe

    Sweatpants
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    $11
    Puma Athletic Shorts (view 2)Puma Athletic Shorts (view 1)Price Drop
    View Product: Puma Athletic Shorts

    Puma

    Athletic Shorts
    Size 6-9 mo
    $12.24 $6.73 45% off with code GOBIG
    33% off estimated retail
    Tommy Hilfiger Pullover Hoodie (view 2)Tommy Hilfiger Pullover Hoodie (view 1)Price Drop
    View Product: Tommy Hilfiger Pullover Hoodie

    Tommy Hilfiger

    Pullover Hoodie
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    75% off estimated retail
    The Children's Place Sweatpants (view 2)The Children's Place Sweatpants (view 1)Price Drop
    View Product: The Children's Place Sweatpants

    The Children's Place

    Sweatpants
    Size 6-9 mo
    $10.99 $6.04 45% off with code GOBIG
    43% off estimated retail
    First Impressions Zip Up Hoodie (view 2)First Impressions Zip Up Hoodie (view 1)Price Drop
    View Product: First Impressions Zip Up Hoodie

    First Impressions

    Zip Up Hoodie
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    72% off estimated retail
    Majestic Active Pants (view 2)Majestic Active Pants (view 1)Price Drop
    View Product: Majestic Active Pants

    Majestic

    Active Pants
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    33% off estimated retail
    Disney Sweatpants (view 2)Disney Sweatpants (view 1)Price Drop
    View Product: Disney Sweatpants

    Disney

    Sweatpants
    Size 6-9 mo
    $10.99 $6.04 45% off with code GOBIG
    18% off estimated retail
    Star Wars Sweatpants (view 2)Star Wars Sweatpants (view 1)Price Drop
    View Product: Star Wars Sweatpants

    Star Wars

    Sweatpants
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    $11
    Guess Baby Sweatpants (view 2)Guess Baby Sweatpants (view 1)Price Drop
    View Product: Guess Baby Sweatpants

    Guess Baby

    Sweatpants
    Size 6-9 mo
    $12.24 $6.73 45% off with code GOBIG
    63% off estimated retail
    Puma Active Pants (view 2)Puma Active Pants (view 1)Price Drop
    View Product: Puma Active Pants

    Puma

    Active Pants
    Size 6-9 mo
    $11.99 $6.59 45% off with code GOBIG
    33% off estimated retail
    Robar Fleece Pants (view 2)Robar Fleece Pants (view 1)Price Drop
    View Product: Robar Fleece Pants

    Robar

    Fleece Pants
    Size 6-9 mo
    $8.99 $4.94 45% off with code GOBIG
    50% off estimated retail
    Under Armour Track Pants (view 2)Under Armour Track Pants (view 1)Price Drop
    View Product: Under Armour Track Pants

    Under Armour

    Track Pants
    Size 6-9 mo
    $12.24 $6.73 45% off with code GOBIG
    63% off estimated retail
    First Impressions Sweatpants (view 2)First Impressions Sweatpants (view 1)Price Drop
    View Product: First Impressions Sweatpants

    First Impressions

    Sweatpants
    Size 6-9 mo
    $11.24 $6.18 45% off with code GOBIG
    66% off estimated retail
    Puma Active T-Shirt (view 2)Puma Active T-Shirt (view 1)Price Drop
    View Product: Puma Active T-Shirt

    Puma

    Active T-Shirt
    Size 6-9 mo
    $13.24 $7.28 45% off with code GOBIG
    59% off estimated retail
    Nike Athletic Shorts (view 2)Nike Athletic Shorts (view 1)Price Drop
    View Product: Nike Athletic Shorts

    Nike

    Athletic Shorts
    Size 6-9 mo
    $11.24 $6.18 45% off with code GOBIG
    70% off estimated retail
    Polarn O. Pyret Zip Up Hoodie (view 2)Polarn O. Pyret Zip Up Hoodie (view 1)Price Drop
    View Product: Polarn O. Pyret Zip Up Hoodie

    Polarn O. Pyret

    Zip Up Hoodie
    Size 6-9 mo
    $11.24 $6.18 45% off with code GOBIG
    73% off estimated retail
    Croissant Zip Up Hoodie (view 2)Croissant Zip Up Hoodie (view 1)Price Drop
    View Product: Croissant Zip Up Hoodie

    Croissant

    Zip Up Hoodie
    Size 6-9 mo
    $7.99 $4.39 45% off with code GOBIG
    42% off estimated retail
    Reebok Sweatpants (view 2)Reebok Sweatpants (view 1)Price Drop
    View Product: Reebok Sweatpants

    Reebok

    Sweatpants
    Size 6-9 mo
    $11.24 $6.18 45% off with code GOBIG
    65% off estimated retail
    Puma Track Pants (view 2)Puma Track Pants (view 1)Price Drop
    View Product: Puma Track Pants

    Puma

    Track Pants
    Size 6-9 mo
    $11.24 $6.18 45% off with code GOBIG
    55% off estimated retail
    AND1 Athletic Shorts (view 2)AND1 Athletic Shorts (view 1)Price Drop
    View Product: AND1 Athletic Shorts

    AND1

    Athletic Shorts
    Size 6-9 mo
    $8.99 $4.94 45% off with code GOBIG
    $7
    The Children's Place Sweatpants (view 2)The Children's Place Sweatpants (view 1)Price Drop
    View Product: The Children's Place Sweatpants

    The Children's Place

    Sweatpants
    Size 6-9 mo
    $7.99 $4.39 45% off with code GOBIG
    53% off estimated retail
    The Children's Place Sweatpants (view 2)The Children's Place Sweatpants (view 1)Price Drop
    View Product: The Children's Place Sweatpants

    The Children's Place

    Sweatpants
    Size 6-9 mo
    $8.99 $4.94 45% off with code GOBIG
    46% off estimated retail
    Kyle & Deena Sweatpants (view 2)Kyle & Deena Sweatpants (view 1)Price Drop
    View Product: Kyle & Deena Sweatpants

    Kyle & Deena

    Sweatpants
    Size 6-9 mo
    $8.99 $4.94 45% off with code GOBIG
    20% off estimated retail
    Jumping Beans Fleece Pants (view 2)Jumping Beans Fleece Pants (view 1)Price Drop
    View Product: Jumping Beans Fleece Pants

    Jumping Beans

    Fleece Pants
    Size 6-9 mo
    $8.99 $4.94 45% off with code GOBIG
    20% off estimated retail
    The Children's Place Active T-Shirt (view 2)The Children's Place Active T-Shirt (view 1)Price Drop
    View Product: The Children's Place Active T-Shirt

    The Children's Place

    Active T-Shirt
    Size 6-9 mo
    $8.99 $4.94 45% off with code GOBIG
    46% off estimated retail
    Farm Boy Co-op Sweatpants (view 2)Farm Boy Co-op Sweatpants (view 1)
    View Product: Farm Boy Co-op Sweatpants

    Farm Boy Co-op

    Sweatpants
    Size 6-9 mo
    $8.24 $4.53 45% off with code GOBIG
    53% off estimated retail
    Back
    1
    Next