Feelgood Grain Small Animal Bear Flat have a removable heat up wheat bag insert. Wheat bag insert are filled with 100% Australian Wheat, which has been grown, sown and packaged in country Victoria, Australia. Wheat bag inserts can be heated in the microwave and can provide lasting warmth to assist in relieving aches and pains and keep you warm on those cold days. Alternatively, the wheat bag insert can be placed in a plastic bag and popped into the freezer and used as cold pack for bumps and bruises, or to help keep you cool on hot days. Penetrating wheat bag heat therapy may assist in relieving muscle pain, backache, leg cramps, menstrual cramps, headache/migraines, neck soreness, stress, aching joints, tension and anxiety, cold feet and hands.