How to use: Wear the Echo Long Sleeve Tee as a base layer in winter or on its own during other seasons for running, hiking, or ski touring. It's suitable for all - weather outdoor activities. Note: Avoid using harsh detergents as they may damage the fabric's special features. Wash it in cold water and let it air dry. Maintenance: Regularly check the seams and logo for any signs of wear. If the fabric loses its odor - control ability over time, you can still use it as a regular shirt. But for the best performance, consider replacing it after a few years of heavy use.