A hearing device is provided. The hearing device is suitable for being at least partially inserted into an ear canal is provided. The hearing device comprises a barrier. The barrier is configured to prevent foreign matter inside the ear canal from passing. The barrier comprises a body and a structure. The body has a surface. The structure is a microstructure or a nanostructure. The structure is formed on at least a first part of the surface. The first part is thus configured to hinder the foreign matter from adhering thereto. The structure and the body are monolithic.