50% Less fat. 25% Fewer calories compared to the market leader of swirls string cheese. Low moisture part skim mozzarella cheese with added color. Made from milk! High in calcium. 60 Calories per serving. Frigo Cheese Heads light swirls are the go-to healthy snacks when you're on-the-go! Light string cheese has 2.5 grams of fat per serving compared with 6 grams of fat in regular swirls string cheese. Calories reduced from 80 to 60 per serving.