How to use: Put on this baselayer t - shirt directly against your skin. It's great to wear under other clothes for extra warmth and comfort during your daily activities or workouts. Note: Make sure to check the size before purchasing to ensure a proper fit. Avoid sharp objects that could damage the fabric. Maintenance: Machine wash it in cold water with like colors. Use a mild detergent. Tumble dry on low to keep it in good condition.