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Boys' tops come in such a variety of styles and colors, they're the perfect way to start planning an entire outfit. Shop at thredUP when you're looking for an excellent selection of like-new boys' tops that range from casual to dressy and at prices up to 90% off estimated retail.

SleevelessRemove filter
66 items
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    Air Jordan Sleeveless Jersey (view 2)Air Jordan Sleeveless Jersey (view 1)
    View Product: Air Jordan Sleeveless Jersey

    Air Jordan

    Sleeveless Jersey
    Size 7
    $25.99
    60% off estimated retail
    Gap Kids Sleeveless T-Shirt (view 2)Gap Kids Sleeveless T-Shirt (view 1)
    View Product: Gap Kids Sleeveless T-Shirt

    Gap Kids

    Sleeveless T-Shirt
    Size 8
    $12.99
    38% off estimated retail
    Nike Sleeveless T-Shirt (view 2)Nike Sleeveless T-Shirt (view 1)
    View Product: Nike Sleeveless T-Shirt

    Nike

    Sleeveless T-Shirt
    Size 5
    $11.99
    47% off estimated retail
    TeddyBoom Sleeveless T-Shirt (view 2)TeddyBoom Sleeveless T-Shirt (view 1)
    View Product: TeddyBoom Sleeveless T-Shirt

    TeddyBoom

    Sleeveless T-Shirt
    Size 0-3 mo
    $6.99 $7
    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 Large youth
    $18.99
    53% 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 5
    $12.99
    61% 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 4
    $13.99
    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
    $14.99
    48% off estimated retail
    Marvel Sleeveless T-Shirt (view 2)Marvel Sleeveless T-Shirt (view 1)
    View Product: Marvel Sleeveless T-Shirt

    Marvel

    Sleeveless T-Shirt
    Size 3T
    $7.99
    55% off estimated retail
    Wonder Nation Sleeveless T-Shirt (view 2)Wonder Nation Sleeveless T-Shirt (view 1)
    View Product: Wonder Nation Sleeveless T-Shirt

    Wonder Nation

    Sleeveless T-Shirt
    Size 10
    $10.99
    18% off estimated retail
    Nike Sleeveless T-Shirt (view 2)Nike Sleeveless T-Shirt (view 1)
    View Product: Nike Sleeveless T-Shirt

    Nike

    Sleeveless T-Shirt
    Size Small kids
    $14.99
    39% off estimated retail
    Adidas Sleeveless T-Shirt (view 2)Adidas Sleeveless T-Shirt (view 1)
    View Product: Adidas Sleeveless T-Shirt

    Adidas

    Sleeveless T-Shirt
    Size 6
    $13.99
    48% off estimated retail
    Marvel Sleeveless T-Shirt (view 2)Marvel Sleeveless T-Shirt (view 1)
    View Product: Marvel Sleeveless T-Shirt

    Marvel

    Sleeveless T-Shirt
    Size 8
    $10.99
    59% off estimated retail
    Gap Fit Sleeveless T-Shirt (view 2)Gap Fit Sleeveless T-Shirt (view 1)
    View Product: Gap Fit Sleeveless T-Shirt

    Gap Fit

    Sleeveless T-Shirt
    Size 8
    $11.99
    59% 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 4T
    $15.99
    52% 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 5
    $14.99 $11.24 25% off with code HOTDEAL
    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 X-Large youth
    $22.99 $16.09 30% off with code HOTDEAL
    48% off estimated retail
    Adidas Sleeveless Jersey (view 2)Adidas Sleeveless Jersey (view 1)
    View Product: Adidas Sleeveless Jersey

    Adidas

    Sleeveless Jersey
    Size Small youth
    $18.99 $14.24 25% off with code HOTDEAL
    40% off estimated retail
    Champion Sleeveless Jersey (view 2)Champion Sleeveless Jersey (view 1)
    View Product: Champion Sleeveless Jersey

    Champion

    Sleeveless Jersey
    Size Large youth
    $11.99 $9.59 20% off with code HOTDEAL
    31% 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 7
    $17.99 $14.39 20% off with code HOTDEAL
    63% off estimated retail
    Under Armour Sleeveless T-Shirt (view 2)Under Armour Sleeveless T-Shirt (view 1)
    View Product: Under Armour Sleeveless T-Shirt

    Under Armour

    Sleeveless T-Shirt
    Size Large youth
    $12.99 $9.74 25% off with code HOTDEAL
    59% off estimated retail
    Nike Sleeveless Jersey (view 2)Nike Sleeveless Jersey (view 1)
    View Product: Nike Sleeveless Jersey

    Nike

    Sleeveless Jersey
    Size 4T
    $8.99 $7.19 20% off with code HOTDEAL
    65% off estimated retail
    Air Jordan Sleeveless T-Shirt (view 2)Air Jordan Sleeveless T-Shirt (view 1)
    View Product: Air Jordan Sleeveless T-Shirt

    Air Jordan

    Sleeveless T-Shirt
    Size 4
    $16.99 $13.59 20% off with code HOTDEAL
    63% off estimated retail
    Reebok Sleeveless Jersey (view 2)Reebok Sleeveless Jersey (view 1)
    View Product: Reebok Sleeveless Jersey

    Reebok

    Sleeveless Jersey
    Size 4T
    $10.99 $8.79 20% off with code HOTDEAL
    60% off estimated retail
    Athletic Works Active T-Shirt (view 2)Athletic Works Active T-Shirt (view 1)
    View Product: Athletic Works Active T-Shirt

    Athletic Works

    Active T-Shirt
    Size X-Small kids
    $7.99 $6.39 20% off with code HOTDEAL
    42% off estimated retail
    Zoozatz Sleeveless T-Shirt (view 2)Zoozatz Sleeveless T-Shirt (view 1)New With Tags
    View Product: Zoozatz Sleeveless T-Shirt

    Zoozatz

    Sleeveless T-Shirt
    Size Large kids
    $11.99 $9.59 20% off with code HOTDEAL
    79% off estimated retail
    Theory Sleeveless T-Shirt (view 2)Theory Sleeveless T-Shirt (view 1)
    View Product: Theory Sleeveless T-Shirt

    Theory

    Sleeveless T-Shirt
    Size 7
    $21.99 $15.39 30% off with code HOTDEAL
    65% off estimated retail
    Nike Sleeveless T-Shirt (view 2)Nike Sleeveless T-Shirt (view 1)
    View Product: Nike Sleeveless T-Shirt

    Nike

    Sleeveless T-Shirt
    Size 7
    $13.99 $10.49 25% off with code HOTDEAL
    48% off estimated retail
    New Balance Active T-Shirt (view 2)New Balance Active T-Shirt (view 1)
    View Product: New Balance Active T-Shirt

    New Balance

    Active T-Shirt
    Size 10
    $12.99 $10.39 20% off with code HOTDEAL
    73% off estimated retail
    Okie Dokie Sleeveless T-Shirt (view 2)Okie Dokie Sleeveless T-Shirt (view 1)New With Tags
    View Product: Okie Dokie Sleeveless T-Shirt

    Okie Dokie

    Sleeveless T-Shirt
    Size 12 mo
    $8.99 $7.19 20% off with code HOTDEAL
    $7
    VKM Sleeveless Jersey (view 2)VKM Sleeveless Jersey (view 1)
    View Product: VKM Sleeveless Jersey

    VKM

    Sleeveless Jersey
    Size Large youth
    $7.99 $6.39 20% off with code HOTDEAL
    50% off estimated retail
    VKM Sleeveless Jersey (view 2)VKM Sleeveless Jersey (view 1)
    View Product: VKM Sleeveless Jersey

    VKM

    Sleeveless Jersey
    Size Large youth
    $7.99 $6.39 20% off with code HOTDEAL
    50% off estimated retail
    Holloway Active T-Shirt (view 2)Holloway Active T-Shirt (view 1)
    View Product: Holloway Active T-Shirt

    Holloway

    Active T-Shirt
    Size Large youth
    $12.99 $10.39 20% off with code HOTDEAL
    37% 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
    $15.99 $11.19 30% off with code HOTDEAL
    51% 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 X-Small youth
    $20.99 $15.74 25% off with code HOTDEAL
    58% off estimated retail
    Little Miss Tennis Sleeveless T-Shirt (view 2)Little Miss Tennis Sleeveless T-Shirt (view 1)
    View Product: Little Miss Tennis Sleeveless T-Shirt

    Little Miss Tennis

    Sleeveless T-Shirt
    Size Small kids
    $7.99 $6.39 20% off with code HOTDEAL
    69% off estimated retail
    SoulCycle Sleeveless T-Shirt (view 2)SoulCycle Sleeveless T-Shirt (view 1)
    View Product: SoulCycle Sleeveless T-Shirt

    SoulCycle

    Sleeveless T-Shirt
    Size Small youth
    $13.99 $11.19 20% off with code HOTDEAL
    55% off estimated retail
    New Balance Sleeveless T-Shirt (view 2)New Balance Sleeveless T-Shirt (view 1)
    View Product: New Balance Sleeveless T-Shirt

    New Balance

    Sleeveless T-Shirt
    Size 12 mo
    $14.99 $11.24 25% off with code HOTDEAL
    45% off estimated retail
    Mick Mack Ltd Sleeveless T-Shirt (view 2)Mick Mack Ltd Sleeveless T-Shirt (view 1)
    View Product: Mick Mack Ltd Sleeveless T-Shirt

    Mick Mack Ltd

    Sleeveless T-Shirt
    Size 3 mo
    $10.99 $7.14 35% off with code HOTDEAL
    33% off estimated retail
    Minnetonka Active T-Shirt (view 2)Minnetonka Active T-Shirt (view 1)
    View Product: Minnetonka Active T-Shirt

    Minnetonka

    Active T-Shirt
    Size 6-12 mo
    $16.99 $10.19 40% off with code HOTDEAL
    40% off estimated retail
    FOCUS kids Sleeveless T-Shirt (view 2)FOCUS kids Sleeveless T-Shirt (view 1)Price Drop
    View Product: FOCUS kids Sleeveless T-Shirt

    FOCUS kids

    Sleeveless T-Shirt
    Size 9 mo
    $19.99 $8.00 60% off with code HOTDEAL
    64% off estimated retail
    Perfectly Dressed Sleeveless T-Shirt (view 2)Perfectly Dressed Sleeveless T-Shirt (view 1)Price Drop
    View Product: Perfectly Dressed Sleeveless T-Shirt

    Perfectly Dressed

    Sleeveless T-Shirt
    Size Medium kids
    $8.99 $5.84 35% off with code HOTDEAL
    27% off estimated retail
    Pro Player Active T-Shirt (view 2)Pro Player Active T-Shirt (view 1)Price Drop
    View Product: Pro Player Active T-Shirt

    Pro Player

    Active T-Shirt
    Size 2T
    $11.99 $7.19 40% off with code HOTDEAL
    18% off estimated retail
    FILA Sleeveless T-Shirt (view 2)FILA Sleeveless T-Shirt (view 1)Price Drop
    View Product: FILA Sleeveless T-Shirt

    FILA

    Sleeveless T-Shirt
    Size 8
    $13.99 $6.30 55% off with code HOTDEAL
    59% off estimated retail
    2XU Active T-Shirt (view 2)2XU Active T-Shirt (view 1)Price Drop
    View Product: 2XU Active T-Shirt

    2XU

    Active T-Shirt
    Size Medium kids
    $16.99 $10.19 40% off with code HOTDEAL
    80% off estimated retail
    Assorted Brands Sleeveless T-Shirt (view 2)Assorted Brands Sleeveless T-Shirt (view 1)Price Drop
    View Product: Assorted Brands Sleeveless T-Shirt

    Assorted Brands

    Sleeveless T-Shirt
    Size X-Large youth
    $11.99 $7.19 40% off with code HOTDEAL
    54% off estimated retail
    Just One You Made by Carter's Sleeveless T-Shirt (view 2)Just One You Made by Carter's Sleeveless T-Shirt (view 1)Price Drop
    View Product: Just One You Made by Carter's Sleeveless T-Shirt

    Just One You Made by Carter's

    Sleeveless T-Shirt
    Size 3 mo
    $7.99 $4.79 40% off with code HOTDEAL
    $7
    Athletic Works Sleeveless Jersey (view 2)Athletic Works Sleeveless Jersey (view 1)Price Drop
    View Product: Athletic Works Sleeveless Jersey

    Athletic Works

    Sleeveless Jersey
    Size 12 mo
    $8.99 $5.39 40% off with code HOTDEAL
    $7
    Athletic Works Sleeveless Jersey (view 2)Athletic Works Sleeveless Jersey (view 1)Price Drop
    View Product: Athletic Works Sleeveless Jersey

    Athletic Works

    Sleeveless Jersey
    Size 18 mo
    $8.99 $5.39 40% off with code HOTDEAL
    $7
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)Price Drop
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size Small infants
    $12.99 $7.79 40% off with code HOTDEAL
    63% off estimated retail
    J. Khaki Active T-Shirt (view 2)J. Khaki Active T-Shirt (view 1)Price Drop
    View Product: J. Khaki Active T-Shirt

    J. Khaki

    Active T-Shirt
    Size Large youth
    $11.99 $7.19 40% off with code HOTDEAL
    37% off estimated retail
    Assorted Brands Sleeveless T-Shirt (view 2)Assorted Brands Sleeveless T-Shirt (view 1)Price Drop
    View Product: Assorted Brands Sleeveless T-Shirt

    Assorted Brands

    Sleeveless T-Shirt
    Size Small youth
    $11.99 $7.19 40% off with code HOTDEAL
    54% off estimated retail
    Zyia Active Sleeveless T-Shirt (view 2)Zyia Active Sleeveless T-Shirt (view 1)Price Drop
    View Product: Zyia Active Sleeveless T-Shirt

    Zyia Active

    Sleeveless T-Shirt
    Size X-Small kids
    $14.24 $7.83 45% off with code HOTDEAL
    63% off estimated retail
    Madgame Sleeveless Jersey (view 2)Madgame Sleeveless Jersey (view 1)Price Drop
    View Product: Madgame Sleeveless Jersey

    Madgame

    Sleeveless Jersey
    Size 18 mo
    $7.99 $4.79 40% off with code HOTDEAL
    $7
    Kinloch Anderson Sleeveless T-Shirt (view 2)Kinloch Anderson Sleeveless T-Shirt (view 1)Price Drop
    View Product: Kinloch Anderson Sleeveless T-Shirt

    Kinloch Anderson

    Sleeveless T-Shirt
    Size 60 cm
    $8.99 $5.39 40% off with code HOTDEAL
    46% off estimated retail
    Assorted Brands Sleeveless Jersey (view 2)Assorted Brands Sleeveless Jersey (view 1)Price Drop
    View Product: Assorted Brands Sleeveless Jersey

    Assorted Brands

    Sleeveless Jersey
    Size 18 mo
    $10.99 $6.59 40% off with code HOTDEAL
    40% off estimated retail
    Adidas Active T-Shirt (view 2)Adidas Active T-Shirt (view 1)Price Drop
    View Product: Adidas Active T-Shirt

    Adidas

    Active T-Shirt
    Size 6 mo
    $11.99 $7.19 40% off with code HOTDEAL
    63% off estimated retail
    Mad Game Sleeveless Jersey (view 2)Mad Game Sleeveless Jersey (view 1)Price Drop
    View Product: Mad Game Sleeveless Jersey

    Mad Game

    Sleeveless Jersey
    Size 18 mo
    $6.99 $4.19 40% off with code HOTDEAL
    45% off estimated retail
    Adidas Active T-Shirt (view 2)Adidas Active T-Shirt (view 1)Price Drop
    View Product: Adidas Active T-Shirt

    Adidas

    Active T-Shirt
    Size 9 mo
    $11.99 $7.19 40% off with code HOTDEAL
    63% off estimated retail
    Arli Active T-Shirt (view 2)Arli Active T-Shirt (view 1)Price Drop
    View Product: Arli Active T-Shirt

    Arli

    Active T-Shirt
    Size Small kids
    $11.24 $6.74 40% off with code HOTDEAL
    55% off estimated retail
    FILA Active T-Shirt (view 2)FILA Active T-Shirt (view 1)Price Drop
    View Product: FILA Active T-Shirt

    FILA

    Active T-Shirt
    Size 8
    $11.99 $6.59 45% off with code HOTDEAL
    75% off estimated retail
    Adidas Active T-Shirt (view 2)Adidas Active T-Shirt (view 1)Price Drop
    View Product: Adidas Active T-Shirt

    Adidas

    Active T-Shirt
    Size 3 mo
    $12.24 $7.34 40% off with code HOTDEAL
    65% off estimated retail
    Nike Active T-Shirt (view 2)Nike Active T-Shirt (view 1)Price Drop
    View Product: Nike Active T-Shirt

    Nike

    Active T-Shirt
    Size 6-9 mo
    $11.24 $6.74 40% off with code HOTDEAL
    65% off estimated retail
    Jessica Simpson Sleeveless T-Shirt (view 2)Jessica Simpson Sleeveless T-Shirt (view 1)
    View Product: Jessica Simpson Sleeveless T-Shirt

    Jessica Simpson

    Sleeveless T-Shirt
    Size 10
    $7.99 $4.79 40% off with code HOTDEAL
    53% off estimated retail
    Carter's Short Sleeve Henley (view 2)Carter's Short Sleeve Henley (view 1)Price Drop
    View Product: Carter's Short Sleeve Henley

    Carter's

    Short Sleeve Henley
    Size Up to 7lbs
    $8.24 $4.94 40% off with code HOTDEAL
    60% off estimated retail
    Cradle Togs Active T-Shirt (view 2)Cradle Togs Active T-Shirt (view 1)
    View Product: Cradle Togs Active T-Shirt

    Cradle Togs

    Active T-Shirt
    Size 12 mo
    $9.99 $5.99 40% off with code HOTDEAL
    10% off estimated retail
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