Merino wool base layers are easy to care for and maintain with a few simple guidelines. It's generally recommended to wash them in cool water and avoid using harsh detergents or bleach, which can damage the wool fibers. Instead, use a gentle wool-specific detergent or a mild soap, and avoid using fabric softeners or dryer sheets, which can leave a residue on the fabric and diminish its moisture-wicking and temperature regulating properties. When drying, lay the base layers flat to avoid stretching or distortion, and avoid using high heat, which can cause the wool to shrink. By following these instructions, you can ensure that your Merino wool base layers remain soft, comfortable, and effective for years to come.