Under Armour HeatGear Junior  ‘Armour Up’ Tee Shirt

Under Armour HeatGear Junior ‘Armour Up’ Tee Shirt

Regular price £13.99

Under Armour HeatGear Boys 'Armour Up' Tee is a technical junior baselayer. Well ventilated and durable it has the quality and feel of a performance piece.  

HeatGear – Wear this when it’s hot outside to keep cool. It aids in cooling the body by actively pushing heat from the body out through the fabric. 

4-Way Stretch – Fabric allowing movement in multiple directions, without resisting the movement or damaging the fabric for superior shape holding, comfort and fit. 

Moisture Transport System – Ventilation system that removes moisture from the skin to transfer it through the fabric. This keeps the garment comfortable to wear.


  • Heat Gear
  • Fitted Fit:  A slimmer, more athletic cut. 
  • Moisture Transport System
  • 4-Way Stretch 
  • Anti-Odor
  • Mesh Back Panel 
  • Polyester and Elastane
  • Style: 125380/001
  • Colour: Black /Red



We don't want you choosing the wrong size when you buy from us so we have added a simple, easy to read size chart below to make sure you find the right sized baselayer tee  that fits you perfectly.


That's easier said than done. Because, what do you do if you are in between two sizes?
Well, that's up to you. Do you like a tight fit? Go for the smaller size. Prefer a loose fit? Go for the larger size.
Top Tip: If your body measurements for chest and waist result in two different suggested sizes, order the size from your chest measurement