Which type of face mask should I wear on board?
You must wear a face mask which entirely covers mouth and nose. Face shields and masks with a valve are not permitted on board, as they allow the air to escape to the side and do not provide comparable protection.
For health reasons, an exemption from the mask requirement may be accepted, only when providing a negative Covid-19 PCR test (not older than 48 hours before departure) and a current medical certificate via the Brussels Airlines form.