Boys Extended Sizes - Short Sleeves | Under Armour

Featured
- New Arrivals
- Valentine's Day Edit
- Back to Gym
- Wide Leg Pants
- Everyday Essentials
- Short & Tall
- Plus Size
Shop by Category
- Baselayer
- Hoodies & Sweatshirts
- Jackets & Vests
  - Jackets
  - Vests
- Leggings
- Matching Sets
- Shirts & Tops
- Shoes
  - Basketball
  - Fishing
  - Hiking & Hunting
  - Lacrosse
  - Military & Tactical
  - Running
  - Sandals & Slides
  - Soccer
  - Softball
  - Sportswear
  - Training
  - Volleyball
- Shorts
- Sports Bras
- Sweatpants & Joggers
- Underwear
Shop by Sport
- Basketball
- Flag Football
- Golf
- Hiking & Outdoor
- Pickleball & Tennis
- Running
- Softball
- Training
- Volleyball
- Yoga & Pilates
Shop by Collection
Accessories
- Backpacks & Bags
- Beanies & Cold Weather Gear
- Crossbody & Waist Bags
- Hats & Visors
- Headbands & Scrunchies
- Lunch Boxes
- Socks
- Sport Gloves
- Sunglasses
- Water Bottles & Coolers

Featured
Boys
Girls
- Accessories
- Baselayer
- Hoodies & Sweatshirts
- Jackets
- Pants & Leggings
  - Athletic Pants, Sweatpants & Joggers
  - Leggings
- Shirts & Tops
- Shoes
  - Basketball
  - Running & Training
  - Sandals & Slides
  - Softball
  - Sportswear
- Shorts
- Sports Bras
Shop by Sport
- Hockey
- Baseball
- Basketball
- Flag Football
- Football
- Golf
- Softball
- Soccer
- Volleyball
Shop by Size
- Big Kids (8-20)
- Little Kids (4-7)
- Toddler (2T - 4T)
- Infant (12M - 24M)
- Newborn (0M - 9M)

Featured
Shop by Category
- Sandals & Slides
- Cleats
- Lifestyle Shoes
- Boots
- Wide Shoes
- Running & Training
Shop by Gender
Shop by Sport
Shop by Collection
- Bryce Harper
- UA Velociti
- UA Charged+
- UA Halo
- UA SlipSpeed™
- Curry Brand
- D. Fox 2
- Project Rock