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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.

18-24 moRemove filter
32 items
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    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 18-24 mo
    $21.99
    54% off estimated retail
    Nike Athletic Shorts (view 2)Nike Athletic Shorts (view 1)
    View Product: Nike Athletic Shorts

    Nike

    Athletic Shorts
    Size 18-24 mo
    $13.99
    48% off estimated retail
    Janie and Jack Sweatpants (view 2)Janie and Jack Sweatpants (view 1)
    View Product: Janie and Jack Sweatpants

    Janie and Jack

    Sweatpants
    Size 18-24 mo
    $9.99
    66% off estimated retail
    Gap x Disney Pullover Hoodie (view 2)Gap x Disney Pullover Hoodie (view 1)
    View Product: Gap x Disney Pullover Hoodie

    Gap x Disney

    Pullover Hoodie
    Size 18-24 mo
    $14.99
    65% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Unbranded Pullover Hoodie (view 2)Unbranded Pullover Hoodie (view 1)
    View Product: Unbranded Pullover Hoodie

    Unbranded

    Pullover Hoodie
    Size 18-24 mo
    $14.99
    48% off estimated retail
    The Children's Place Sweatpants (view 2)The Children's Place Sweatpants (view 1)
    View Product: The Children's Place Sweatpants

    The Children's Place

    Sweatpants
    Size 18-24 mo
    $7.99
    55% off estimated retail
    Adidas Track Jacket (view 2)Adidas Track Jacket (view 1)
    View Product: Adidas Track Jacket

    Adidas

    Track Jacket
    Size 18-24 mo
    $15.99 $11.99 25% off with code THANKU
    40% off estimated retail
    The Children's Place Zip Up Hoodie (view 2)The Children's Place Zip Up Hoodie (view 1)
    View Product: The Children's Place Zip Up Hoodie

    The Children's Place

    Zip Up Hoodie
    Size 18-24 mo
    $14.99 $11.99 20% off with code THANKU
    44% off estimated retail
    Gap Fit Sweatpants (view 2)Gap Fit Sweatpants (view 1)
    View Product: Gap Fit Sweatpants

    Gap Fit

    Sweatpants
    Size 18-24 mo
    $14.99 $11.99 20% off with code THANKU
    44% off estimated retail
    Gap Fit Sweatpants (view 2)Gap Fit Sweatpants (view 1)
    View Product: Gap Fit Sweatpants

    Gap Fit

    Sweatpants
    Size 18-24 mo
    $14.99 $11.99 20% off with code THANKU
    44% off estimated retail
    Splendid Pullover Hoodie (view 2)Splendid Pullover Hoodie (view 1)
    View Product: Splendid Pullover Hoodie

    Splendid

    Pullover Hoodie
    Size 18-24 mo
    $16.99 $12.74 25% off with code THANKU
    61% off estimated retail
    Janie and Jack Pullover Hoodie (view 2)Janie and Jack Pullover Hoodie (view 1)
    View Product: Janie and Jack Pullover Hoodie

    Janie and Jack

    Pullover Hoodie
    Size 18-24 mo
    $13.99 $11.19 20% off with code THANKU
    61% off estimated retail
    Baby Gap Zip Up Hoodie (view 2)Baby Gap Zip Up Hoodie (view 1)
    View Product: Baby Gap Zip Up Hoodie

    Baby Gap

    Zip Up Hoodie
    Size 18-24 mo
    $11.99 $9.59 20% off with code THANKU
    62% off estimated retail
    Crazy 8 Zip Up Hoodie (view 2)Crazy 8 Zip Up Hoodie (view 1)
    View Product: Crazy 8 Zip Up Hoodie

    Crazy 8

    Zip Up Hoodie
    Size 18-24 mo
    $6.99 $5.59 20% off with code THANKU
    56% off estimated retail
    Baby Gap Pullover Hoodie (view 2)Baby Gap Pullover Hoodie (view 1)
    View Product: Baby Gap Pullover Hoodie

    Baby Gap

    Pullover Hoodie
    Size 18-24 mo
    $12.99 $10.39 20% off with code THANKU
    59% off estimated retail
    Baby Gap Athletic Shorts (view 2)Baby Gap Athletic Shorts (view 1)
    View Product: Baby Gap Athletic Shorts

    Baby Gap

    Athletic Shorts
    Size 18-24 mo
    $9.99 $7.99 20% off with code THANKU
    28% off estimated retail
    Old Navy Zip Up Hoodie (view 2)Old Navy Zip Up Hoodie (view 1)
    View Product: Old Navy Zip Up Hoodie

    Old Navy

    Zip Up Hoodie
    Size 18-24 mo
    $11.99 $9.59 20% off with code THANKU
    33% off estimated retail
    Hanna Andersson Fleece Pants (view 2)Hanna Andersson Fleece Pants (view 1)
    View Product: Hanna Andersson Fleece Pants

    Hanna Andersson

    Fleece Pants
    Size 18-24 mo Slim
    $17.99 $13.49 25% off with code THANKU
    43% off estimated retail
    Baby Gap Zip Up Hoodie (view 2)Baby Gap Zip Up Hoodie (view 1)
    View Product: Baby Gap Zip Up Hoodie

    Baby Gap

    Zip Up Hoodie
    Size 18-24 mo
    $16.99 $13.59 20% off with code THANKU
    46% off estimated retail
    Zara Sweatpants (view 2)Zara Sweatpants (view 1)
    View Product: Zara Sweatpants

    Zara

    Sweatpants
    Size 18-24 mo
    $12.99 $10.39 20% off with code THANKU
    51% off estimated retail
    Baby Gap One Piece Snowsuit (view 2)Baby Gap One Piece Snowsuit (view 1)
    View Product: Baby Gap One Piece Snowsuit

    Baby Gap

    One Piece Snowsuit
    Size 18-24 mo
    $42.99 $34.39 20% off with code THANKU
    54% off estimated retail
    PLACE Sport Zip Up Hoodie (view 2)PLACE Sport Zip Up Hoodie (view 1)
    View Product: PLACE Sport Zip Up Hoodie

    PLACE Sport

    Zip Up Hoodie
    Size 18-24 mo
    $9.99 $7.99 20% off with code THANKU
    44% off estimated retail
    Baby Gap Track Jacket (view 2)Baby Gap Track Jacket (view 1)Price Drop
    View Product: Baby Gap Track Jacket

    Baby Gap

    Track Jacket
    Size 18-24 mo
    $14.99 $11.99 20% off with code THANKU
    53% off estimated retail
    Baby Gap Zip Up Hoodie (view 2)Baby Gap Zip Up Hoodie (view 1)Price Drop
    View Product: Baby Gap Zip Up Hoodie

    Baby Gap

    Zip Up Hoodie
    Size 18-24 mo
    $13.99 $11.19 20% off with code THANKU
    56% off estimated retail
    Old Navy Pullover Hoodie (view 2)Old Navy Pullover Hoodie (view 1)Price Drop
    View Product: Old Navy Pullover Hoodie

    Old Navy

    Pullover Hoodie
    Size 18-24 mo
    $9.99 $7.99 20% off with code THANKU
    44% off estimated retail
    Million Polkadots Pullover Hoodie (view 2)Million Polkadots Pullover Hoodie (view 1)Price Drop
    View Product: Million Polkadots Pullover Hoodie

    Million Polkadots

    Pullover Hoodie
    Size 18-24 mo
    $10.99 $7.69 30% off with code THANKU
    75% off estimated retail
    Old Navy Zip Up Hoodie (view 2)Old Navy Zip Up Hoodie (view 1)Price Drop
    View Product: Old Navy Zip Up Hoodie

    Old Navy

    Zip Up Hoodie
    Size 18-24 mo
    $9.99 $7.99 20% off with code THANKU
    44% off estimated retail
    Baby Gap Pullover Hoodie (view 2)Baby Gap Pullover Hoodie (view 1)Price Drop
    View Product: Baby Gap Pullover Hoodie

    Baby Gap

    Pullover Hoodie
    Size 18-24 mo
    $11.99 $9.59 20% off with code THANKU
    62% off estimated retail
    Primark Zip Up Hoodie (view 2)Primark Zip Up Hoodie (view 1)Price Drop
    View Product: Primark Zip Up Hoodie

    Primark

    Zip Up Hoodie
    Size 18-24 mo
    $9.99 $7.99 20% off with code THANKU
    33% off estimated retail
    Baby Gap Zip Up Hoodie (view 2)Baby Gap Zip Up Hoodie (view 1)Price Drop
    View Product: Baby Gap Zip Up Hoodie

    Baby Gap

    Zip Up Hoodie
    Size 18-24 mo
    $10.99 $8.79 20% off with code THANKU
    65% off estimated retail
    Old Navy Athletic Shorts (view 2)Old Navy Athletic Shorts (view 1)
    View Product: Old Navy Athletic Shorts

    Old Navy

    Athletic Shorts
    Size 18-24 mo
    $8.99 $7.19 20% off with code THANKU
    18% off estimated retail
    Old Navy Zip Up Hoodie (view 2)Old Navy Zip Up Hoodie (view 1)Price Drop
    View Product: Old Navy Zip Up Hoodie

    Old Navy

    Zip Up Hoodie
    Size 18-24 mo
    $8.99 $7.19 20% off with code THANKU
    50% off estimated retail
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