Our Healthy Living pillows are filled with anti-allergenic Estlon treated fibre, using active ingredient AEM 5700, which reduces fungal levels by 99% compared with untreated fibres. They have a cotton cover and are designed to assist those suffering from asthma and breathing difficulties. Filling: Estlon fibre. Conforms to the furniture and furnishings fire safety regulations. Fire Retardant to BS7175 Source 2