Doomoo Snoogy contains a removable heating pad with rapeseed and lavender inside that can be heated in the microwave. The rapeseed provides comforting warmth and the lavender diffuses a pleasant aroma with a calming effect. You can place it on your baby's tummy to help relieve cramps and colic in a natural way, or you can place it on your baby's bed to give him/her a pleasant warmth that helps him/her to relax and fall asleep. You must heat the pillow in the microwave at 700W for 45 seconds. If necessary, add another 15 seconds until the desired temperature is reached. The outside can be machine washed at 30º. The seed cushion is not washable.