Mask cushion for a full face mask

1. A mask cushion for a full face mask, wherein the mask cushion comprises only one sealing lip, a sealing area adapted for facing a patient's face and leading into the sealing lip, a contact area to a mask body, and a deformation area which extends between the contact area and the sealing area, the deformation area having a first height (H 1 ) at a base at the bottom, a second height (H 2 ) at the top in a nose bridge area, and a third height (H 3 ) laterally in a paranasal area, with the first height (H 1 ) being at least twice as high as the third height (H 3 ).

2. The mask cushion of claim 1 , wherein the first height (H 1 ) is greater than the second height (H 2 ), and the second height is greater than the third height (H 3 ).

3. The mask cushion of claim 1 , wherein H 1 is 25 mm+/−3 mm high and/or H 2 is 20 mm+/−2.5 mm high.

4. The mask cushion of claim 1 , wherein the mask cushion is made of an elastomeric plastic and has at least two different wall thicknesses.

5. The mask cushion of claim 1 , wherein a wall thickness in the deformation area at the base and in the nose bridge area is thinner than laterally in the paranasal area.

6. The mask cushion of claim 1 , wherein a wall thickness in the deformation area in the nose bridge area is thinner than a wall thickness in the deformation area at the base, and a wall thickness at the base is thinner than laterally in the paranasal area.

7. The mask cushion of claim 1 , wherein a wall thickness laterally in the paranasal area is at least twice a wall thickness in the deformation area at the base.

8. The mask cushion of claim 1 , wherein a maximum length of the cushion is 105 mm+/−6 mm and a maximum width of the cushion is 90 mm+/−4 mm.

9. The mask cushion of claim 1 , wherein an outer width in a nose bridge area is three times wider than in an inner section of the nose area.

10. The mask cushion of claim 1 , wherein an outer width is 35 mm+/−3 mm in a nose area, and 8 mm+/−2 mm in an inner section of the nose area.

11. The mask cushion of claim 1 , wherein a wall thickness in the nose bridge area is ≤0.6 mm.

12. The mask cushion of claim 11 , wherein the wall thickness in the nose bridge area ranges from 0.2 mm to 0.5 mm.

13. The mask cushion of claim 1 , wherein a wall thickness of a paranasal side area ranges from 1.2 mm to 2.9 mm.

14. The mask cushion of claim 13 , wherein the wall thickness in the paranasal side area ranges from 1.5 mm to 2.5 mm.

15. The mask cushion of claim 13 , wherein the wall thickness in the paranasal side area is 2.1 mm+/−0.2 mm.

16. The mask cushion of claim 1 , wherein the wall thickness in the deformation area continuously decreases from the base toward a wall of the sealing lip.

17. The mask cushion of claim 1 , wherein a wall thickness (W 4 ) of the sealing lip is 0.2-0.75 mm and designed substantially uniformly around its complete circumference.

18. A full face mask, wherein the mask comprises the mask cushion of claim 1 .

19. The full face mask of claim 18 , wherein the mask further comprises a steplessly adjustable forehead support.

20. The full face mask of claim 18 , wherein the mask further comprises a forehead support which comprises a spring element.