SUB COLD keeps your body warm but doesn"t over heat it. At only 230gsm, it is one of the lightest thermal baselayers out there. The internally brushed fibres provide extra comfort and help maintain muscle temperature without hindering body movement. The fabric wicks excess moisture away from your body to keep you dry as well as warm. It also provides optimum levels of compression to enhance blood flow back to the heart, allowing you to train harder for longer.