Boys' Sportswear & Gym Clothing

125 Items

UA Vanish Seamless

UA Vanish Seamless
Boys' Short Sleeve

Price: £21.97 - £31
UA Vanish

UA Vanish
Boys' Shorts

Price: £24.97 - £31
UA Magnetico Select 5 FG Jr.
new

UA Magnetico Select 5 FG Jr.
Boys' Soccer Cleats

Price: £45
UA Tech™ Utility

UA Tech™ Utility
Boys' ¼ Zip

Price: £35

Level Up Your Kit with Under Armour's Boys' Sports Clothes

Hit the pitch, court, or gym in style with Under Armour’s latest performance sportswear for boys. Built to move, built to win.

UA Tech™ Utility

UA Tech™ Utility
Boys' Short Sleeve

Price: £26
UA Tech™ Utility Woven

UA Tech™ Utility Woven
Boys' Shorts

Price: £26
UA Phantom 4

UA Phantom 4
Grade School Running Shoes

Price: £75
Armour Fleece® Pro Utility
new

Armour Fleece® Pro Utility
Boys' Full Zip

Price: £60
UA Rival Fleece

UA Rival Fleece
Boys' Suit

Price: £70
UA Rival Fleece

UA Rival Fleece
Boys' Joggers

Price: £35
UA Icon Knit

UA Icon Knit
Boys' Tracksuit

Price: £32.97 - £55
UA Lockdown 7

UA Lockdown 7
Grade School Basketball Shoes

Price: £31.97 - £40
UA Rival Fleece

UA Rival Fleece
Boys' Hoodie

Price: £27.97 - £40
UA Rival Knit

UA Rival Knit
Boys' Tracksuit

Price: £39.97 - £50
UA Unstoppable Woven

UA Unstoppable Woven
Boys' Joggers

Price: £55
Armour Fleece® Pro Utility
new

Armour Fleece® Pro Utility
Boys' Pants

Price: £55
UA Tech™ 2.0

UA Tech™ 2.0
Boys' Short Sleeve

Price: £16.97 - £19
UA Drive Hybrid Storm SweaterFleece
new

UA Drive Hybrid Storm SweaterFleece
Boys' ½ Zip

Price: £45
UA Matchplay

UA Matchplay
Boys' Joggers

Price: £50
UA Tech™ Utility Woven

UA Tech™ Utility Woven
Boys' Pants

Price: £44
Boys' Grade School UA Assert 10 Running Shoes

Boys' Grade School UA Assert 10 Running Shoes
Boys' Grade School Running Shoes

Price: £31.97 - £45
HeatGear® Armour
Keeps You Cool

HeatGear® Armour
Boys' Long Sleeve

Price: £26
UA Tech™ 2.0

UA Tech™ 2.0
Boys' ½ Zip

Price: £19.97 - £31

Boys' Sportswear & Gym Clothing

You’ve set your targets. Now it’s all about the grit, the grind, the hard work. Under Armour boys’ sportswear gives you pro-grade gear that helps you train better. Our boys' sports gear and shoes are built with advanced technologies and tough materials that boost your performance and help you train harder, longer and faster. 

We’ve built boys’ gym wear and performancewear for all popular sports, including running, athletics, gym training, football, basketball, and golf. Our range includes all sports wear for boys that you need for every season - including base layers, shorts, t-shirts, tracksuits, jackets, hoodies, shoes, socks, bags and hats. 

Under Armour boys’ sportswear helps you train better because we use professional grade fabrics that let you push your limits. You’ll find tech like HeatGear®, a performance baselayer built for warm weather training, that keeps you cool while letting sweat wick extra fast. For winter sessions, ColdGear® keeps you warm, while remaining highly breathable and without adding bulk. We use UA Storm on many of our boys’ sports clothing - it’s a treatment that keeps you dry, but means our trousers and jackets are still breathable so you can keep training in comfort. 

Our boys' sports shoes boost your performance by using advanced technologies and designs that help you play better. UA Magnetico football boots require zero break-in, so you can get back to training without blisters. We built our boys running shoes using UA HOVR™ cushioning, which is incredibly springy and durable. And our boys’ basketball shoes include tech like UA Flow - a rubberless grip and cushioning system, for fast, lightweight flowing movement across court. 

Browse our performancewear for boys, and find the gear you need to smash your targets.