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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.
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![Real Essentials Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/612234366/complimentary.jpg)
![Real Essentials Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/612234346/complimentary.jpg)
Real Essentials
Active T-Shirt
Size X-Large kids
$7.99 $4.39 45% off with code GOBIG
50% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611734141/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611734061/complimentary.jpg)
Under Armour
Active T-Shirt
Size Large youth
$17.99 $9.89 45% off with code GOBIG
56% off estimated retail![Nike Long Sleeve Jersey (view 2)](https://cf-assets-thredup.thredup.com/assets/612292024/complimentary.jpg)
![Nike Long Sleeve Jersey (view 1)](https://cf-assets-thredup.thredup.com/assets/612291916/complimentary.jpg)
Nike
Long Sleeve Jersey
Size X-Large youth
$28.99 $15.94 45% off with code GOBIG
61% off estimated retail![Under Armour Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611797650/complimentary.jpg)
![Under Armour Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611797634/complimentary.jpg)
Under Armour
Short Sleeve T-Shirt
Size Large youth
$11.99 $6.59 45% off with code GOBIG
55% off estimated retail![Mojang Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611771515/complimentary.jpg)
![Mojang Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611771451/complimentary.jpg)
Mojang
Short Sleeve T-Shirt
Size Small youth
$9.99 $5.49 45% off with code GOBIG
54% off estimated retail![Champion Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611617454/complimentary.jpg)
![Champion Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611617406/complimentary.jpg)
Champion
Long Sleeve T-Shirt
Size Medium youth
$9.99 $5.49 45% off with code GOBIG
37% off estimated retail![Calvin Klein Short Sleeve Henley (view 2)](https://cf-assets-thredup.thredup.com/assets/612064779/complimentary.jpg)
![Calvin Klein Short Sleeve Henley (view 1)](https://cf-assets-thredup.thredup.com/assets/612064732/complimentary.jpg)
Calvin Klein
Short Sleeve Henley
Size 24 mo
$9.99 $5.49 45% off with code GOBIG
37% off estimated retail![7 For All Mankind Pullover Sweater (view 2)](https://cf-assets-thredup.thredup.com/assets/612069943/complimentary.jpg)
![7 For All Mankind Pullover Sweater (view 1)](https://cf-assets-thredup.thredup.com/assets/612069854/complimentary.jpg)
7 For All Mankind
Pullover Sweater
Size 24 mo
$14.99 $8.24 45% off with code GOBIG
72% off estimated retail![Active by Old Navy Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/612257254/complimentary.jpg)
![Active by Old Navy Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/612257221/complimentary.jpg)
Active by Old Navy
Long Sleeve T-Shirt
Size 14
$6.99 $3.84 45% off with code GOBIG
56% off estimated retail![Volcom Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/612110729/complimentary.jpg)
![Volcom Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/612110615/complimentary.jpg)
Volcom
Short Sleeve T-Shirt
Size Large kids
$10.99 $6.04 45% off with code GOBIG
59% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611930757/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611930659/complimentary.jpg)
Under Armour
Active T-Shirt
Size Small youth
$21.99 $12.09 45% off with code GOBIG
46% off estimated retail![Sonic The Hedgehog Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/609976671/complimentary.jpg)
![Sonic The Hedgehog Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/609976591/complimentary.jpg)
Sonic The Hedgehog
Long Sleeve T-Shirt
Size Large kids
$4.99 $2.74 45% off with code GOBIG
28% off estimated retail![Mojang Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611547205/complimentary.jpg)
![Mojang Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611547148/complimentary.jpg)
Mojang
Long Sleeve T-Shirt
Size Large youth
$9.99 $5.49 45% off with code GOBIG
54% off estimated retail![Standard Textile Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611384100/complimentary.jpg)
![Standard Textile Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611384083/complimentary.jpg)
Standard Textile
Short Sleeve T-Shirt
Size 6 mo
$5.99 $3.29 45% off with code GOBIG
14% off estimated retail![Jurassic World Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/610910836/complimentary.jpg)
![Jurassic World Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/610910815/complimentary.jpg)
Jurassic World
Short Sleeve T-Shirt
Size 4
$13.99 $7.69 45% off with code GOBIG
22% off estimated retail![Mojang Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611717764/complimentary.jpg)
![Mojang Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611717690/complimentary.jpg)
Mojang
Short Sleeve T-Shirt
Size Medium kids
$10.99 $6.04 45% off with code GOBIG
50% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611319736/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611319684/complimentary.jpg)
Under Armour
Active T-Shirt
Size Small youth
$13.99 $7.69 45% off with code GOBIG
48% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611481419/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611481378/complimentary.jpg)
Under Armour
Active T-Shirt
Size Medium youth
$19.99 $10.99 45% off with code GOBIG
51% off estimated retail![Under Armour Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611287896/complimentary.jpg)
![Under Armour Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611287857/complimentary.jpg)
Under Armour
Short Sleeve T-Shirt
Size Large youth
$10.99 $6.04 45% off with code GOBIG
59% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611368764/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611368655/complimentary.jpg)
Under Armour
Active T-Shirt
Size Medium youth
$19.99 $10.99 45% off with code GOBIG
51% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611985973/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611985859/complimentary.jpg)
Under Armour
Active T-Shirt
Size Medium youth
$21.99 $12.09 45% off with code GOBIG
46% off estimated retail![Life Is Good Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611292635/complimentary.jpg)
![Life Is Good Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611292589/complimentary.jpg)
Life Is Good
Short Sleeve T-Shirt
Size X-Large youth
$9.99 $5.49 45% off with code GOBIG
63% off estimated retail![Gap Kids Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611293481/complimentary.jpg)
![Gap Kids Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611293447/complimentary.jpg)
Gap Kids
Short Sleeve T-Shirt
Size Large youth
$8.99 $4.94 45% off with code GOBIG
57% off estimated retail![Under Armour Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611900110/complimentary.jpg)
![Under Armour Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611900094/complimentary.jpg)
Under Armour
Short Sleeve T-Shirt
Size Small youth
$11.99 $6.59 45% off with code GOBIG
55% off estimated retail![Vineyard Vines Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611818312/complimentary.jpg)
![Vineyard Vines Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611818116/complimentary.jpg)
Vineyard Vines
Long Sleeve T-Shirt
Size Medium youth
$13.99 $7.69 45% off with code GOBIG
48% off estimated retail![Under Armour Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611784941/complimentary.jpg)
![Under Armour Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611784889/complimentary.jpg)
Under Armour
Short Sleeve T-Shirt
Size Large youth
$11.99 $6.59 45% off with code GOBIG
55% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611367335/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611367249/complimentary.jpg)
Under Armour
Active T-Shirt
Size X-Large youth
$18.99 $10.44 45% off with code GOBIG
53% off estimated retail![Mojang Long Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611582381/complimentary.jpg)
![Mojang Long Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611582339/complimentary.jpg)
Mojang
Long Sleeve T-Shirt
Size Medium kids
$9.99 $5.49 45% off with code GOBIG
54% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611480721/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611480694/complimentary.jpg)
Under Armour
Active T-Shirt
Size Small youth
$18.99 $10.44 45% off with code GOBIG
53% off estimated retail![Mad Engine Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611269378/complimentary.jpg)
![Mad Engine Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611269301/complimentary.jpg)
Mad Engine
Short Sleeve T-Shirt
Size Small kids
$10.99 $6.04 45% off with code GOBIG
21% off estimated retail![Hurley Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611300546/complimentary.jpg)
![Hurley Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611300511/complimentary.jpg)
Hurley
Short Sleeve T-Shirt
Size Medium youth
$13.99 $7.69 45% off with code GOBIG
57% off estimated retail![Tommy Hilfiger Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611223160/complimentary.jpg)
![Tommy Hilfiger Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611223138/complimentary.jpg)
Tommy Hilfiger
Short Sleeve T-Shirt
Size 12 mo
$6.99 $3.84 45% off with code GOBIG
61% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611467941/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611467914/complimentary.jpg)
Under Armour
Active T-Shirt
Size Medium youth
$19.99 $10.99 45% off with code GOBIG
51% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611481547/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611481528/complimentary.jpg)
Under Armour
Active T-Shirt
Size Medium youth
$17.99 $9.89 45% off with code GOBIG
56% off estimated retail![Abercrombie & Fitch Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611349581/complimentary.jpg)
![Abercrombie & Fitch Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611349563/complimentary.jpg)
Abercrombie & Fitch
Short Sleeve T-Shirt
Size 7
$12.99 $7.14 45% off with code GOBIG
60% off estimated retail![Active by Old Navy Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611355640/complimentary.jpg)
![Active by Old Navy Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611355609/complimentary.jpg)
Active by Old Navy
Active T-Shirt
Size Small kids
$9.99 $5.49 45% off with code GOBIG
50% off estimated retail![Mojang Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611354056/complimentary.jpg)
![Mojang Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611354024/complimentary.jpg)
Mojang
Short Sleeve T-Shirt
Size Medium youth
$9.99 $5.49 45% off with code GOBIG
54% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611322980/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611322904/complimentary.jpg)
Under Armour
Active T-Shirt
Size Medium youth
$13.99 $7.69 45% off with code GOBIG
48% off estimated retail![Nickelodeon Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611469962/complimentary.jpg)
![Nickelodeon Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611469916/complimentary.jpg)
Nickelodeon
Short Sleeve T-Shirt
Size X-Large kids
$12.99 $7.14 45% off with code GOBIG
18% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611355201/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611355133/complimentary.jpg)
Under Armour
Active T-Shirt
Size X-Large youth
$18.99 $10.44 45% off with code GOBIG
53% off estimated retail![Under Armour Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611114120/complimentary.jpg)
![Under Armour Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611114082/complimentary.jpg)
Under Armour
Short Sleeve T-Shirt
Size X-Small youth
$14.99 $8.24 45% off with code GOBIG
44% off estimated retail![Lulu Roo Short Sleeve T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/610913128/complimentary.jpg)
![Lulu Roo Short Sleeve T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/610913109/complimentary.jpg)
Lulu Roo
Short Sleeve T-Shirt
Size 6-12 mo
$11.99 $6.59 45% off with code GOBIG
45% off estimated retail![Under Armour Active T-Shirt (view 2)](https://cf-assets-thredup.thredup.com/assets/611209359/complimentary.jpg)
![Under Armour Active T-Shirt (view 1)](https://cf-assets-thredup.thredup.com/assets/611209315/complimentary.jpg)
Under Armour
Active T-Shirt
Size Medium kids
$18.99 $10.44 45% off with code GOBIG
53% off estimated retail