An inhalation mask (1) for fitting to a snout of an equine animal or an animal having an equine shaped snout is provided and comprise: a unitary mask body (6) defining a housing with an open end (11) which is adapted to overfit and accommodate the snout of the animal. The open end (11) of the housing being an integral part of the housing and forming a deformable seal about the open end (11) for sealing about the snout of the animal, wherein the open end (11) of the housing comprises a deformable lip (10) which forms the deformable seal, the lip (10) being formed by a continuation of a side wall (7) forming the mask body (6), which when the mask (1) is fitted, turns back inward upon itself, into the open end (11) of the mask (1), so that the lip (10) engages with the animals snout to support the mask body (6) on the snout.
