They are a counter-serve chain specializing in sub & club sandwiches, plus signature potato chips. Jimmy John’s, refers to their sandwiches as “The Sandwich of Sandwiches”. This is because they use fresh vegetables, hand-slice their own provolone cheese and meats in-house every day, and bake bread all day. The flavors of all of these combined is what makes a Jimmy John’s sandwich, their trademark “Sandwich of Sandwiches”.