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Boys' activewear tops are ideal for the busy little men in your life. You'll never pay retail for these hard-wearing apparel items again when you shop at thredUP.

1,455 items
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    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size Medium kids
    $14.99 $8.24 45% off with code GOBIG
    63% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Grace Active T-Shirt (view 2)Grace Active T-Shirt (view 1)
    View Product: Grace Active T-Shirt

    Grace

    Active T-Shirt
    Size Small youth
    $9.99 $5.49 45% off with code GOBIG
    69% off estimated retail
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size Small youth
    $16.99 $9.34 45% off with code GOBIG
    58% off estimated retail
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size 12 mo
    $11.99 $6.59 45% off with code GOBIG
    55% off estimated retail
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size 18 mo
    $11.99 $6.59 45% off with code GOBIG
    55% off estimated retail
    Puma Active T-Shirt (view 2)Puma Active T-Shirt (view 1)
    View Product: Puma Active T-Shirt

    Puma

    Active T-Shirt
    Size 3-6 mo
    $7.99 $4.39 45% off with code GOBIG
    63% off estimated retail
    Champion Active T-Shirt (view 2)Champion Active T-Shirt (view 1)
    View Product: Champion Active T-Shirt

    Champion

    Active T-Shirt
    Size Large kids
    $12.99 $7.14 45% off with code GOBIG
    48% off estimated retail
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size X-Small kids
    $17.99 $9.89 45% off with code GOBIG
    47% off estimated retail
    Adidas Active T-Shirt (view 2)Adidas Active T-Shirt (view 1)
    View Product: Adidas Active T-Shirt

    Adidas

    Active T-Shirt
    Size Small youth
    $12.99 $7.14 45% off with code GOBIG
    68% off estimated retail
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size 6 mo
    $8.99 $4.94 45% off with code GOBIG
    66% off estimated retail
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size 12 mo
    $13.99 $7.69 45% off with code GOBIG
    48% off estimated retail
    Gap Fit Active T-Shirt (view 2)Gap Fit Active T-Shirt (view 1)
    View Product: Gap Fit Active T-Shirt

    Gap Fit

    Active T-Shirt
    Size X-Small youth
    $13.99 $7.69 45% off with code GOBIG
    65% off estimated retail
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size Small kids
    $14.99 $8.24 45% off with code GOBIG
    55% off estimated retail
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size 6 mo
    $9.99 $5.49 45% off with code GOBIG
    63% off estimated retail
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size 6 mo
    $9.99 $5.49 45% off with code GOBIG
    63% off estimated retail
    Head Active T-Shirt (view 2)Head Active T-Shirt (view 1)
    View Product: Head Active T-Shirt

    Head

    Active T-Shirt
    Size Medium kids
    $13.99 $7.69 45% off with code GOBIG
    65% off estimated retail
    Athleta Active T-Shirt (view 2)Athleta Active T-Shirt (view 1)
    View Product: Athleta Active T-Shirt

    Athleta

    Active T-Shirt
    Size Small kids
    $16.99 $9.34 45% off with code GOBIG
    58% off estimated retail
    Athleta Active T-Shirt (view 2)Athleta Active T-Shirt (view 1)
    View Product: Athleta Active T-Shirt

    Athleta

    Active T-Shirt
    Size Small youth
    $16.99 $9.34 45% off with code GOBIG
    65% off estimated retail