Maintain your focus and improve your performance in training with the under armour heatgear armour compression ss t shirt in royal blue and steel greythis short sleeved base layer top from under armour has an ultra tight compression fabric that enhances performance by speeding up muscle recovery and improving blood flow a smooth chafe free flatlock seam construction with 4 way stretch fabrication brings comfort and flexibility upf 30 protection also shields you from the suns harmful rays i