olbas for children contains a mixture of essential pure plant oils which gives off natural vapours to immediately clear nasal congestion & relieve painful sinuses. o!bas for children is specially formulated for children & infants to gently clear blocked up noses. it is useful for the treatment of colds & flu, catarrh, hayfever & blocked sinuses., for children & infants over 3 months, for the relief of children's blocked nose