Mouth protection device for a respiratory protection system, in particular a blower respiratory protection system, with at least one mask base body which is configured to cover a mouth and/or nose region of a user and which delimits a breathing zone at least partially, and with at least one breathing air supply line, which is connected to the mask base body and delimits at least one breathing air channel that ends in the breathing zone and is configured for guiding an active breathing air flow (26a; 26b), wherein the mask base body is made at least largely of a flexurally soft material, characterised by at least one further breathing air supply line (22'a), which is redundant to the breathing air supply line, which is connected with the mask base body and which delimits at least one further breathing air channel that ends in the breathing zone and is configured for guiding an active breathing air flow (26a; 26b), and by at least one separating layer, which is connected to the mask base body and is configured to at least partially separate the breathing zone from an outlet region, the outlet region being at least partially delimited by the mask base body, wherein the separating layer forms together with the mask base body a channel which at least partly forms the breathing zone and extends as far as a middle region of the mouth protection device, wherein the channel formed by the separating layer extends from the breathing air channel and the further breathing air channel as far as a user's mouth and/or nose region, wherein in the user's mouth and/or nose region the breathing zone merges into the outlet region, wherein the separating layer protrudes perpendicularly to the mask base body between the breathing zone and the outlet region, wherein the separating layer has in a middle region a recess connecting the breathing zone to the outlet region, wherein the outlet region is arranged at least below the breathing zone. with at least one mask base body which is configured to cover a mouth and/or nose region of a user and which delimits a breathing zone at least partially, and with at least one breathing air supply line, which is connected to the mask base body and delimits at least one breathing air channel that ends in the breathing zone and is configured for guiding an active breathing air flow (26a; 26b), wherein the mask base body is made at least largely of a flexurally soft material, characterised by at least one further breathing air supply line (22'a), which is redundant to the breathing air supply line, which is connected with the mask base body and which delimits at least one further breathing air channel that ends in the breathing zone and is configured for guiding an active breathing air flow (26a; 26b), and by at least one separating layer, which is connected to the mask base body and is configured to at least partially separate the breathing zone from an outlet region, the outlet region being at least partially delimited by the mask base body, wherein the separating layer forms together with the mask base body a channel which at least partly forms the breathing zone and extends as far as a middle region of the mouth protection device, wherein the channel formed by the separating layer extends from the breathing air channel and the further breathing air channel as far as a user's mouth and/or nose region, wherein in the user's mouth and/or nose region the breathing zone merges into the outlet region, wherein the separating layer protrudes perpendicularly to the mask base body between the breathing zone and the outlet region, wherein the separating layer has in a middle region a recess connecting the breathing zone to the outlet region, wherein the outlet region is arranged at least below the breathing zone.