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Boy's Activewear

Explore our top-notch selection of boys activewear designed for unparalleled comfort and performance. Our range includes everything from sleek baselayers to stylish T-shirts, perfect for every young athlete's needs. Constructed with the latest technology, these garments offer flexibility and durability, ensuring they stand up to rigorous wear. For chilly days, our cold weather gear provides warmth without compromising on mobility. Discover more premium options at Under Armour, or explore our complimentary products for girls in the Girls Activewear Outlet. Equip your young champion with the best clothing that melds style with functionality.

499 Results

  3. Selling Fast!
    Junior Deflect 2.0 Woven Running Pant

    MonterrainJunior Deflect 2.0 Woven Running Pant

    £50.00£25.0050% Off
    EXTRA 10% OFF CODE: PAYDAY
  4. The North Face Larsech Kids Grey Jacket

    The North FaceThe North Face Larsech Kids Grey Jacket

    £69.99£34.9950% Off
    EXTRA 10% OFF CODE: PAYDAY
  5. Selling Fast!
    Junior Deflect 2.0 Woven Running Jacket

    MonterrainJunior Deflect 2.0 Woven Running Jacket

    £55.00£28.0049% Off
    EXTRA 10% OFF CODE: PAYDAY
  6. Kids Park 26 Dri-fit T Shirt Training Jersey in Black

    NikeKids Park 26 Dri-fit T Shirt Training Jersey in Black

    £15.00£13.987% Off
    EXTRA 10% OFF CODE: PAYDAY
  7. The North Face New Mittelegi Kids Grey Jacket

    The North FaceThe North Face New Mittelegi Kids Grey Jacket

    £54.99£27.9949% Off
    EXTRA 10% OFF CODE: PAYDAY
  8. Boys Nike Drill Top Juniors in Diffused Blue

    NikeBoys Nike Drill Top Juniors in Diffused Blue

    £32.99£22.0033% Off
    EXTRA 10% OFF CODE: PAYDAY
  9. Under Armour ColdGear Armour Kids Baselayer Legging

    Under ArmourUnder Armour ColdGear Armour Kids Baselayer Legging

    £44.99£17.9960% Off
    EXTRA 10% OFF CODE: PAYDAY
  10. PUMA teamLIGA Quarter-Zip Youth Football Top

    PumaPUMA teamLIGA Quarter-Zip Youth Football Top

    £39.99£13.0063% Off
    EXTRA 10% OFF CODE: PAYDAY
  11. Boys Nike Top Juniors in Black/Obsidia

    NikeBoys Nike Top Juniors in Black/Obsidia

    £14.99£13.0013% Off
    EXTRA 10% OFF CODE: PAYDAY
  12. Under Armour Southampton FC Short Sleeve Kids White Red Football Top 1315409 602

    Under ArmourUnder Armour Southampton FC Short Sleeve Kids White Red Football Top 1315409 602

    £24.99£12.9948% Off
    EXTRA 10% OFF CODE: PAYDAY
  13. Nike Graphic Logo Stretch Waist Black Plain Kids Leggings HA3693 095

    NikeNike Graphic Logo Stretch Waist Black Plain Kids Leggings HA3693 095

    £24.99£10.5058% Off
    EXTRA 10% OFF CODE: PAYDAY
  14. Trespass Boys Iddris Jersey (Blue)

    TrespassTrespass Boys Iddris Jersey (Blue)

    £17.99£10.5042% Off
    EXTRA 10% OFF CODE: PAYDAY
  15. Arsenal 24/25 Third Shorts Kids

    ADIDAS PerformanceArsenal 24/25 Third Shorts Kids

    £29.99£14.0053% Off
    EXTRA 10% OFF CODE: PAYDAY
  16. Vintage Nike Girls Oregan Training Camp T-Shirt

    NikeVintage Nike Girls Oregan Training Camp T-Shirt

    £24.99£6.5074% Off
    EXTRA 10% OFF CODE: PAYDAY
  17. Entrada 22 Training Top

    ADIDAS PerformanceEntrada 22 Training Top

    £24.99£13.0048% Off
    EXTRA 10% OFF CODE: PAYDAY
  18. PUMA teamLIGA Quarter-Zip Youth Football Top

    PumaPUMA teamLIGA Quarter-Zip Youth Football Top

    £39.99£14.9963% Off
    EXTRA 10% OFF CODE: PAYDAY
  19. Nike Girls Tank Top Casual Colour Block Vest Branded Tee Grey 412413 009

    NikeNike Girls Tank Top Casual Colour Block Vest Branded Tee Grey 412413 009

    £34.99£8.0077% Off
    EXTRA 10% OFF CODE: PAYDAY
  20. Nike Boys / Girls Shorts Dri-Fit Academy 25 Black FZ9784

    NikeNike Boys / Girls Shorts Dri-Fit Academy 25 Black FZ9784

    £19.00£13.9818% Off
    EXTRA 10% OFF CODE: PAYDAY
  21. Kids Park 26 Dri-fit T Shirt Jersey in Turquoise

    NikeKids Park 26 Dri-fit T Shirt Jersey in Turquoise

    £15.00£13.987% Off
    EXTRA 10% OFF CODE: PAYDAY
  22. Kids Park Shorts Junior in Turquoise

    NikeKids Park Shorts Junior in Turquoise

    £18.00£12.9813% Off
    EXTRA 10% OFF CODE: PAYDAY
  23. Under Armour Southampton FC Grey Youths Away Football Shorts

    Under ArmourUnder Armour Southampton FC Grey Youths Away Football Shorts

    £24.99£6.5074% Off
    EXTRA 10% OFF CODE: PAYDAY
  24. Puma V5.08 Long Sleeve V-Neck Green Kids Football Top 700472 05

    PumaPuma V5.08 Long Sleeve V-Neck Green Kids Football Top 700472 05

    £24.99£7.5070% Off
    EXTRA 10% OFF CODE: PAYDAY
  25. Kids Park Dri-fit T Shirt Jersey in Navy

    NikeKids Park Dri-fit T Shirt Jersey in Navy

    £18.00£13.987% Off
    EXTRA 10% OFF CODE: PAYDAY
  26. Under Armour Match Play Kids Black Golf Trousers

    Under ArmourUnder Armour Match Play Kids Black Golf Trousers

    £59.99£34.9942% Off
    EXTRA 10% OFF CODE: PAYDAY
  27. Under Armour Showdown Kids Navy Golf Trousers

    Under ArmourUnder Armour Showdown Kids Navy Golf Trousers

    £44.99£26.9940% Off
    EXTRA 10% OFF CODE: PAYDAY
  28. Selling Fast!
    Puma x Scuderia Ferrari Team Kids Red T-Shirt

    PumaPuma x Scuderia Ferrari Team Kids Red T-Shirt

    £39.99£24.9938% Off
    EXTRA 10% OFF CODE: PAYDAY
  29. Nike Boys / Girls Shorts Dri-Fit Academy 25 Navy FZ9784

    NikeNike Boys / Girls Shorts Dri-Fit Academy 25 Navy FZ9784

    £19.00£13.9818% Off
    EXTRA 10% OFF CODE: PAYDAY
  30. Puma Boys / Girls TeamRISE Matchday Training T Shirt Top Green 706284

    PumaPuma Boys / Girls TeamRISE Matchday Training T Shirt Top Green 706284

    £12.00£9.9817% Off
    EXTRA 10% OFF CODE: PAYDAY
  31. Under Armour Reactor Golf Zip Up Sleeveless Navy Blue Kids Gilet 1304001 408

    Under ArmourUnder Armour Reactor Golf Zip Up Sleeveless Navy Blue Kids Gilet 1304001 408

    £49.99£17.9964% Off
    EXTRA 10% OFF CODE: PAYDAY
  32. Aston Martin F1 Official Team Kids Green Softshell Jacket

    Aston MartinAston Martin F1 Official Team Kids Green Softshell Jacket

    £109.99£32.9970% Off
    EXTRA 10% OFF CODE: PAYDAY
  33. The North Face Mittelegi Kids Navy Track Jacket

    The North FaceThe North Face Mittelegi Kids Navy Track Jacket

    £59.99£33.0045% Off
    EXTRA 10% OFF CODE: PAYDAY
  34. Under Armour Welsh Rugby Union WRU Short Sleeve Youth Rugby Top 1298993 017

    Under ArmourUnder Armour Welsh Rugby Union WRU Short Sleeve Youth Rugby Top 1298993 017

    £32.99£12.9961% Off
    EXTRA 10% OFF CODE: PAYDAY
  35. PUMA teamLIGA Youth Football Shorts

    PumaPUMA teamLIGA Youth Football Shorts

    £12.00£11.008% Off
    EXTRA 10% OFF CODE: PAYDAY
  36. Puma Boys / Girls TeamRISE Shorts Junior Green 704943

    PumaPuma Boys / Girls TeamRISE Shorts Junior Green 704943

    £12.00£9.9817% Off
    EXTRA 10% OFF CODE: PAYDAY
  37. Puma Boys / Girls TeamRISE Shorts Junior Black 704943

    PumaPuma Boys / Girls TeamRISE Shorts Junior Black 704943

    £12.00£9.9817% Off
    EXTRA 10% OFF CODE: PAYDAY
  38. Boys adidas Tiro24 Kids Funnel Neck Raglan Sleeve Athletic Top in Black/Dark Grey

    ADIDASBoys adidas Tiro24 Kids Funnel Neck Raglan Sleeve Athletic Top in Black/Dark Grey

    £38.00£24.0037% Off
    EXTRA 10% OFF CODE: PAYDAY
  39. Boys adidas Tiro24 Kids Funnel Neck Raglan Sleeve Athletic Top in Navy Blue

    ADIDASBoys adidas Tiro24 Kids Funnel Neck Raglan Sleeve Athletic Top in Navy Blue

    £38.00£24.0037% Off
    EXTRA 10% OFF CODE: PAYDAY
  40. Jack & Jones Junior Boy's Sweat Zip Hood 2 Pack

    Jack & JonesJack & Jones Junior Boy's Sweat Zip Hood 2 Pack

    £34.20£17.1050% Off
    EXTRA 10% OFF CODE: PAYDAY
  41. Under Armour Storm Kids Blue Fleece Sweater

    Under ArmourUnder Armour Storm Kids Blue Fleece Sweater

    £44.99£20.5054% Off
    EXTRA 10% OFF CODE: PAYDAY
  42. Under Armour Loose Kids Navy Golf Trousers

    Under ArmourUnder Armour Loose Kids Navy Golf Trousers

    £59.99£17.4971% Off
    EXTRA 10% OFF CODE: PAYDAY
  43. Nike Team Kids Yellow/Red Football Shirt

    NikeNike Team Kids Yellow/Red Football Shirt

    £29.99£7.0077% Off
    EXTRA 10% OFF CODE: PAYDAY
  44. The North Face Mittelegi Kids Black Jacket

    The North FaceThe North Face Mittelegi Kids Black Jacket

    £59.99£28.0053% Off
    EXTRA 10% OFF CODE: PAYDAY
  45. Kids Park Dri-fit T Shirt Training Jersey in Red

    NikeKids Park Dri-fit T Shirt Training Jersey in Red

    £15.00£13.987% Off
    EXTRA 10% OFF CODE: PAYDAY
  46. Boys adidas Entrada 22 Track Top Long Sleeve Full Tracksuit in Power Red

    ADIDASBoys adidas Entrada 22 Track Top Long Sleeve Full Tracksuit in Power Red

    £23.00£17.0026% Off
    EXTRA 10% OFF CODE: PAYDAY
  47. Trespass Childrens/Kids Hurry Hiking Trousers (Storm Grey/Yellow Sulphur)

    TrespassTrespass Childrens/Kids Hurry Hiking Trousers (Storm Grey/Yellow Sulphur)

    £49.99£24.9750% Off
    EXTRA 10% OFF CODE: PAYDAY
  48. Puma Neymar JR BNA Kids Blue Jersey Top

    PumaPuma Neymar JR BNA Kids Blue Jersey Top

    £39.99£22.9943% Off
    EXTRA 10% OFF CODE: PAYDAY
  49. Under Armour Showdown Kids Grey Golf Trousers

    Under ArmourUnder Armour Showdown Kids Grey Golf Trousers

    £44.99£26.9940% Off
    EXTRA 10% OFF CODE: PAYDAY
  50. Puma Portugal 2025 Home Replica Kids Red Jersey

    PumaPuma Portugal 2025 Home Replica Kids Red Jersey

    £64.99£34.9946% Off
    EXTRA 10% OFF CODE: PAYDAY