Kolder's NCAA koozies are the perfect fit for your tailgate. Keep your hands warm and your drink cold with these Michigan State Spartans Koozies. Kolder's collapsible can insulator is made from 3 mm neoprene "wetsuit" rubber. The Kolder Kaddy fits 12-ounce cans, folds flat to fit in pockets or purses, and is a great beverage insulator to have with you when attending a concert or sporting event.