Trending Categories
Trending Brands
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.
2,136 items
Sort by:
View Product: Champion Pullover Hoodie
Champion
Pullover Hoodie
Size Medium infants
$10.99 $8.24 25% off with code THANKU
26% off estimated retailView Product: Gap Fit Athletic Shorts
Gap Fit
Athletic Shorts
Size X-Small youth
$9.99 $7.49 25% off with code THANKU
63% off estimated retailView Product: Colosseum Athletics Pullover Hoodie
Colosseum Athletics
Pullover Hoodie
Size 12
$14.99 $10.49 30% off with code THANKU
65% off estimated retailView Product: Under Armour Athletic Shorts
Under Armour
Athletic Shorts
Size X-Small youth
$13.99 $8.39 40% off with code THANKU
48% off estimated retailView Product: Under Armour Pullover Hoodie
Under Armour
Pullover Hoodie
Size Large youth
$26.99 $17.54 35% off with code THANKU
57% off estimated retailView Product: Under Armour Athletic Shorts
Under Armour
Athletic Shorts
Size Medium infants
$11.99 $7.79 35% off with code THANKU
33% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Small youth
$17.99 $12.59 30% off with code THANKU
56% off estimated retailView Product: Champion Pullover Hoodie
Champion
Pullover Hoodie
Size Medium infants
$7.99 $6.39 20% off with code THANKU
46% off estimated retailView Product: Colosseum Athletics Pullover Hoodie
Colosseum Athletics
Pullover Hoodie
Size X-Small youth
$13.99 $9.79 30% off with code THANKU
68% off estimated retailView Product: Abercrombie & Fitch Pullover Hoodie
Abercrombie & Fitch
Pullover Hoodie
Size Small infants
$15.99 $11.19 30% off with code THANKU
63% off estimated retailView Product: Adidas Athletic Shorts
Adidas
Athletic Shorts
Size Medium infants
$8.99 $7.19 20% off with code THANKU
50% off estimated retailView Product: Air Jordan Active T-Shirt
Air Jordan
Active T-Shirt
Size Medium infants
$15.99 $11.99 25% off with code THANKU
63% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Small kids
$16.99 $11.89 30% off with code THANKU
50% off estimated retailView Product: Hurley Pullover Hoodie
Hurley
Pullover Hoodie
Size X-Large youth
$19.99 $14.99 25% off with code THANKU
69% off estimated retailView Product: Edgehill Collection Fleece Pants
Edgehill Collection
Fleece Pants
Size 3 mo
$11.99 $9.59 20% off with code THANKU
55% off estimated retailView Product: Primary Clothing Zip Up Hoodie
Primary Clothing
Zip Up Hoodie
Size 3-6 mo
$11.99 $8.99 25% off with code THANKU
66% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Small youth
$19.99 $13.99 30% off with code THANKU
51% off estimated retailView Product: Hanna Andersson Zip Up Hoodie
Hanna Andersson
Zip Up Hoodie
Size 3-6 mo
$18.99 $10.44 45% off with code THANKU
60% off estimated retailView Product: Hanna Andersson Active Pants
Hanna Andersson
Active Pants
Size 3-6 mo
$16.99 $12.74 25% off with code THANKU
43% off estimated retailView Product: Active by Old Navy Athletic Shorts
Active by Old Navy
Athletic Shorts
Size 10
$9.99 $7.99 20% off with code THANKU
28% off estimated retailView Product: European Culture Zip Up Hoodie
European Culture
Zip Up Hoodie
Size 12 mo
$19.99 $11.99 40% off with code THANKU
65% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Small youth
$17.99 $12.59 30% off with code THANKU
56% off estimated retailView Product: Juicy Couture Zip Up Hoodie
Juicy Couture
Zip Up Hoodie
Size Large infants
$21.99 $14.29 35% off with code THANKU
74% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Large youth
$17.99 $12.59 30% off with code THANKU
56% off estimated retailView Product: TUFF GUYS STREET WEAR Zip Up Hoodie
TUFF GUYS STREET WEAR
Zip Up Hoodie
Size 4T
$10.99 $7.69 30% off with code THANKU
38% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Small youth
$17.99 $12.59 30% off with code THANKU
56% off estimated retailView Product: C9 By Champion Track Pants
C9 By Champion
Track Pants
Size Medium infants
$7.99 $6.39 20% off with code THANKU
27% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Small youth
$19.99 $13.99 30% off with code THANKU
51% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Small youth
$16.99 $11.89 30% off with code THANKU
58% off estimated retailView Product: Legendary Whitetails Pullover Hoodie
Legendary Whitetails
Pullover Hoodie
Size Small youth
$8.99 $7.19 20% off with code THANKU
59% off estimated retailView Product: Under Armour Track Jacket
Under Armour
Track Jacket
Size Small youth
$16.99 $11.89 30% off with code THANKU
58% off estimated retailView Product: Xray Jeans Pullover Hoodie
Xray Jeans
Pullover Hoodie
Size X-Large youth
$20.99 $12.59 40% off with code THANKU
61% off estimated retailView Product: Colosseum Athletics Pullover Hoodie
Colosseum Athletics
Pullover Hoodie
Size 12
$16.99 $12.74 25% off with code THANKU
61% off estimated retailView Product: Under Armour Pullover Hoodie
Under Armour
Pullover Hoodie
Size Small youth
$22.99 $14.94 35% off with code THANKU
58% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Small youth
$19.99 $13.99 30% off with code THANKU
51% off estimated retailView Product: Pro Edge by Knights Apparel Active T-Shirt
Pro Edge by Knights Apparel
Active T-Shirt
Size Small kids
$10.99 $8.79 20% off with code THANKU
59% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size X-Large youth
$17.99 $12.59 30% off with code THANKU
56% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Large youth
$17.99 $12.59 30% off with code THANKU
56% off estimated retailView Product: Tony Hawk Zip Up Hoodie
Tony Hawk
Zip Up Hoodie
Size X-Large youth
$15.99 $9.59 40% off with code THANKU
51% off estimated retailView Product: Assorted Brands Athletic Shorts
Assorted Brands
Athletic Shorts
Size Small kids
$7.99 $6.39 20% off with code THANKU
55% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Small infants
$12.99 $9.74 25% off with code THANKU
51% off estimated retailView Product: New Balance Active T-Shirt
New Balance
Active T-Shirt
Size Small youth
$11.99 $9.59 20% off with code THANKU
63% off estimated retailView Product: Under Armour Pullover Hoodie
Under Armour
Pullover Hoodie
Size Medium infants
$14.99 $8.99 40% off with code THANKU
58% off estimated retailView Product: Tek Gear Athletic Shorts
Tek Gear
Athletic Shorts
Size Large infants
$8.99 $7.19 20% off with code THANKU
18% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Medium youth
$17.99 $12.59 30% off with code THANKU
56% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size Small youth
$17.99 $12.59 30% off with code THANKU
56% off estimated retailView Product: Gap Fit Active T-Shirt
Gap Fit
Active T-Shirt
Size X-Large kids
$18.99 $12.34 35% off with code THANKU
53% off estimated retailView Product: Under Armour Pullover Hoodie
Under Armour
Pullover Hoodie
Size Small youth
$25.99 $16.89 35% off with code THANKU
52% off estimated retailView Product: Under Armour Athletic Shorts
Under Armour
Athletic Shorts
Size Large youth
$14.99 $8.99 40% off with code THANKU
44% off estimated retailView Product: Under Armour Active T-Shirt
Under Armour
Active T-Shirt
Size X-Small youth
$17.99 $12.59 30% off with code THANKU
56% off estimated retailView Product: Reebok Pullover Hoodie
Reebok
Pullover Hoodie
Size X-Small youth
$17.99 $13.49 25% off with code THANKU
67% off estimated retail