Adidas Climachill Short Sleeve Running T-Shirt 100% polyester CLIMACHILL - Keeps you cool with a meshlike fabric and aluminum-silver dots that conduct heat away from the body. 3D Metallic Execution - On the back of the neck for additional cooling. Slim Fit - Provides a comfortable and flattering fit without bulk. Reflective Details - Ensure visibility in low light conditions. Fabric: 100% polyester doubleknit