Boys' Sportswear & Gym Clothing

141 Items

UA Essential

UA Essential
Kids' 6-Pack Quarter Socks

Price: £18
UA Vibe Woven

UA Vibe Woven
Boys' Cargo Shorts

Price: £38
UA Matchplay

UA Matchplay
Boys' Pants

Price: £50
UA Rival Lightweight

UA Rival Lightweight
Boys' ¼ Zip Hoodie

Price: £38
UA Rival Fleece

UA Rival Fleece
Boys' Shorts

Price: £27
UA Matchplay

UA Matchplay
Boys' Polo

Price: £31
UA Tech™ Vent Jacquard

UA Tech™ Vent Jacquard
Boys' Short Sleeve

Price: £25
HeatGear® Armour
Keeps You Cool

HeatGear® Armour
Boys' Leggings

Price: £30
HeatGear® Armour
Keeps You Cool

HeatGear® Armour
Boys' Short Sleeve

Price: £24
UA Tech™ Utility Woven

UA Tech™ Utility Woven
Boys' Pants

Price: £42 - £44
UA Challenger Train

UA Challenger Train
Boys' Short Sleeve

Price: £17
UA Lockdown 7

UA Lockdown 7
Pre-School Basketball Shoes

Price: £40
UA Matchplay

UA Matchplay
Boys' Shorts

Price: £40
UA Icon Knit

UA Icon Knit
Boys' Tracksuit

Price: £27.97 - £55
Boys' Grade School UA Assert 10 Running Shoes

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

Original price: £45, Sale price: £22.97 - £35.97
UA Tech™ Vent Jacquard

UA Tech™ Vent Jacquard
Boys' Short Sleeve

Original price: £26, Sale price: £15.97 - £17.97
UA Blitzing Low

UA Blitzing Low
Boys' Adjustable Cap

Price: £12.97 - £19
UA Matchplay Printed

UA Matchplay Printed
Boys' Polo

Original price: £35, Sale price: £27.97
UA Boxed Sports

UA Boxed Sports
Boys' Short Sleeve

Price: £12.97 - £17
UA Icon Woven

UA Icon Woven
Boys' Pants

Price: £23.97 - £38
UA Icon

UA Icon
Boys' Polo

Original price: £26, Sale price: £17.97
UA Assert 10 AC Synthetic

UA Assert 10 AC Synthetic
Boys' Pre-School Running Shoes

Original price: £40, Sale price: £27.97 - £31.97
UA Brawler 3.0 Tapered

UA Brawler 3.0 Tapered
Boys' Pants

Price: £15.97 - £25
UA Matchplay

UA Matchplay
Boys' Polo

Original price: £31, Sale price: £21.97 - £24.97

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.