This new shirt is full of technologies including a white colour block that has been added to the sleeves, resulting in Adidas' iconic three white stripes appearing in blue and creating a distinctive and striking design. Made with jacquard fabric for extra comfort, this shirt is a must for all junior Chelsea fans, creating a retro look and celebrating the history of the club! Tech-Fit Technology - Helps to improve speed, increase endurance capabilities and enhance awareness. This works by stabilising and focusing the muscles' energy to generate explosive acceleration and deliver maximum power output. CLIMACOOL Technology - A mixture of heat and moisture controlling materials, ventilation channels and 3D fabrics which improve air flow to the skin in the key heat zones. 100 percent Polyester engineered. Crewneck.