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Dive into a huge selection of Under Armour at thredUP, where you can find durable, high-quality boys' clothing for play and school that stand up to the hard knocks of childhood. Think secondhand first and shop like-new hoodies and athletics at 90% off estimated retail prices.

Under ArmourRemove filter2TRemove filter
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    Under Armour Track Jacket (view 2)Under Armour Track Jacket (view 1)
    View Product: Under Armour Track Jacket

    Under Armour

    Track Jacket
    Size 2T
    $11.99
    55% off estimated retail
    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 2T
    $13.99
    48% off estimated retail
    Under Armour Short Sleeve T-Shirt (view 2)Under Armour Short Sleeve T-Shirt (view 1)Flawed Gem
    View Product: Under Armour Short Sleeve T-Shirt

    Under Armour

    Short Sleeve T-Shirt
    Size 2T
    $8.99
    50% off estimated retail
    Under Armour Track Pants (view 2)Under Armour Track Pants (view 1)
    View Product: Under Armour Track Pants

    Under Armour

    Track Pants
    Size 2T
    $17.99
    33% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    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 2T
    $11.99
    55% off estimated retail
    Under Armour Active Pants (view 2)Under Armour Active Pants (view 1)
    View Product: Under Armour Active Pants

    Under Armour

    Active Pants
    Size 2T
    $20.99
    53% off estimated retail
    Under Armour Pullover Hoodie (view 2)Under Armour Pullover Hoodie (view 1)
    View Product: Under Armour Pullover Hoodie

    Under Armour

    Pullover Hoodie
    Size 2T
    $14.99 $11.24 25% off with code THANKU
    58% off estimated retail
    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 2T
    $15.99 $11.19 30% off with code THANKU
    40% off estimated retail
    Under Armour Active Pants (view 2)Under Armour Active Pants (view 1)
    View Product: Under Armour Active Pants

    Under Armour

    Active Pants
    Size 2T
    $19.99 $13.99 30% off with code THANKU
    55% off estimated retail
    Under Armour Zip Up Hoodie (view 2)Under Armour Zip Up Hoodie (view 1)
    View Product: Under Armour Zip Up Hoodie

    Under Armour

    Zip Up Hoodie
    Size 2T
    $16.99 $11.89 30% off with code THANKU
    52% off estimated retail
    Under Armour Active Pants (view 2)Under Armour Active Pants (view 1)
    View Product: Under Armour Active Pants

    Under Armour

    Active Pants
    Size 2T
    $20.99 $14.69 30% off with code THANKU
    48% off estimated retail
    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 2T
    $10.99 $8.79 20% off with code THANKU
    59% off estimated retail
    Under Armour Track Pants (view 2)Under Armour Track Pants (view 1)
    View Product: Under Armour Track Pants

    Under Armour

    Track Pants
    Size 2T
    $14.99 $11.24 25% off with code THANKU
    44% off estimated retail
    Under Armour Active Pants (view 2)Under Armour Active Pants (view 1)
    View Product: Under Armour Active Pants

    Under Armour

    Active Pants
    Size 2T
    $17.99 $12.59 30% off with code THANKU
    56% off estimated retail
    Under Armour Active Pants (view 2)Under Armour Active Pants (view 1)
    View Product: Under Armour Active Pants

    Under Armour

    Active Pants
    Size 2T
    $28.99 $18.84 35% off with code THANKU
    29% off estimated retail
    Under Armour Pullover Hoodie (view 2)Under Armour Pullover Hoodie (view 1)
    View Product: Under Armour Pullover Hoodie

    Under Armour

    Pullover Hoodie
    Size 2T
    $16.99 $10.19 40% off with code THANKU
    52% off estimated retail
    Under Armour Active T-Shirt (view 2)Under Armour Active T-Shirt (view 1)Price Drop
    View Product: Under Armour Active T-Shirt

    Under Armour

    Active T-Shirt
    Size 2T
    $12.99 $9.74 25% off with code THANKU
    51% off estimated retail
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