MI cherry pits have unique insulating therapeutic properties that soothe sore muscles, headaches, cramps, swelling from insect bites, congestion, fibromyalgia, and much more. Keep casseroles warm for taking to pot lucks and warms up cold beds in the winter or keep cool in the summer. The cherry pits are sourced from northern Michigan where 70% of the country’s tart cherries are grown. These bags are made with double layers of 100% cotton fabric and double stitched on the inside and outside for long lasting durability. A special feature is that these cherry pit bags are washable!