100% polyester. Basic spun dyed functional t-shirt made with interlock knitting, side seams, recycled neckband and removable neck label for easy rebranding. Spun dyed is a process where colour pigments are added directly to the text fibre. This significantly reduces the amount of water and chemicals used in the production process. This in turn means an even more environmentally friendly production that also provides better colour depth and colour fastness.