The Calpol Vapour Plug Refill pads contains a blend of aromatic oils including lavender, chamomile, menthol, camphor and eucalpytus. These oild help to soothe and comfort your child at night time whilst helping to ease breathing. Each refilll pad lasts for up to 8 hours. Contains 5 Refill Pads Up to 8 hours release Easy breathing 3 months plus