Hanesbrands, a prominent U.S. undergarment company, engages in cause marketing through its 'Hanes For Good' initiative, partnering with the Salvation Army and Invisible People to donate socks to the homeless during the holiday season. The company's efforts include leveraging social media to raise awareness and encourage community involvement, alongside its commitment to sustainability and corporate philanthropy. With an annual contribution of millions of socks and a focus on employee engagement in volunteer efforts, Hanes aims to enhance its corporate image and drive long-term sales growth.