Boys' Sportswear & Gym Clothing

122 Items

UA Tech™ Utility Woven

UA Tech™ Utility Woven
Boys' Jacket

Original price: £50, Sale price: £35
Black Friday offer: Up to 50% off
UA Tech™ Utility

UA Tech™ Utility
Boys' ¼ Zip

Original price: £35, Sale price: £24.50
Black Friday offer: Up to 50% off
UA Tech™ 2.0

UA Tech™ 2.0
Boys' Short Sleeve

Original price: £19, Sale price: £13.30 - £16.97
Black Friday offer: Up to 50% off
UA Lockdown 7

UA Lockdown 7
Grade School Basketball Shoes

Original price: £40, Sale price: £24 - £31.97
Black Friday offer: Up to 50% off

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 Rival Knit

UA Rival Knit
Boys' Tracksuit

Original price: £50, Sale price: £34.97 - £35
Black Friday offer: Up to 50% off
UA Phantom 4

UA Phantom 4
Grade School Running Shoes

Original price: £75, Sale price: £45 - £52.50
Black Friday offer: Up to 50% off
UA Challenger

UA Challenger
Boys' Tracksuit

Original price: £55, Sale price: £38.50
Black Friday offer: Up to 50% off
UA Rival Colorblock

UA Rival Colorblock
Boys' Knit Tracksuit

Original price: £55, Sale price: £38.50
Black Friday offer: Up to 50% off
UA Rival Fleece

UA Rival Fleece
Boys' Suit

Original price: £70, Sale price: £49
Black Friday offer: Up to 50% off
UA Rival Fleece

UA Rival Fleece
Boys' Hoodie

Original price: £40, Sale price: £27.97 - £28
Black Friday offer: Up to 50% off
Armour Fleece® Pro Utility

Armour Fleece® Pro Utility
Boys' Full Zip

Original price: £60, Sale price: £42
Black Friday offer: Up to 50% off
UA Jet '25

UA Jet '25
Grade School Basketball Shoes

Original price: £45, Sale price: £31.50
Black Friday offer: Up to 50% off
UA Rogue 5

UA Rogue 5
Boys' Running Shoes

Original price: £45, Sale price: £31.50
Black Friday offer: Up to 50% off
UA Pursuit 4 Big Logo AC

UA Pursuit 4 Big Logo AC
Boys' Pre-School Running Shoes

Original price: £37, Sale price: £25.90
Black Friday offer: Up to 50% off
UA Tech™ 2.0

UA Tech™ 2.0
Boys' ½ Zip

Original price: £31, Sale price: £18.60 - £21.97
Black Friday offer: Up to 50% off
UA Pursuit 4

UA Pursuit 4
Boys' Running Shoes

Original price: £45, Sale price: £31.50
Black Friday offer: Up to 50% off
UA Jet '25 VC

UA Jet '25 VC
Grade School Basketball Shoes

Original price: £45, Sale price: £31.50
Black Friday offer: Up to 50% off
UA Rival Fleece Colorblock Graphic

UA Rival Fleece Colorblock Graphic
Boys' Hoodie

Original price: £50, Sale price: £34.97 - £35
Black Friday offer: Up to 50% off
UA Rogue 5 AL

UA Rogue 5 AL
Boys' Pre-School Running Shoes

Original price: £43, Sale price: £30.10 - £33.97
Black Friday offer: Up to 50% off
UA Surge 4 AC

UA Surge 4 AC
Boys' Pre-School Running Shoes

Original price: £33, Sale price: £19.80 - £29.97
Black Friday offer: Up to 50% off
UA Surge 4

UA Surge 4
Boys' Running Shoes

Original price: £37, Sale price: £22.20 - £32.97
Black Friday offer: Up to 50% off
UA Unstoppable Fleece

UA Unstoppable Fleece
Boys' Joggers

Original price: £60, Sale price: £41.97 - £42
Black Friday offer: Up to 50% off
UA Icon Fleece Taping

UA Icon Fleece Taping
Boys' Hoodie

Original price: £50, Sale price: £29.97 - £35
Black Friday offer: Up to 50% off

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.