Mack Trucks has teamed up with Life is Good to help benefit the St. Christopher Truckers Relief Fund. Together, they have put out a limited-edition t-shirt featuring Jake, the Life is Good icon, driving a Mack MD Series truck with the #ThankaTrucker hashtag on it. The shirt is being sold on Mack’s online store and the funds will go toward the trucker relief fund that focuses on helping truckers in need. Click the link below to learn more about this and order the shirt.