a flexible sheet of material, wherein said sheet further comprises a central mouth portion (16), a peripheral portion (18), a wearer facing side (12), and an ambient facing side (14), the peripheral portion being defined by two opposing longitudinal edges joining ends of two opposing lateral edges, the central mouth portion being intermediate two opposing lengths of the sheet defined by the two opposing longitudinal edges and intermediate the two opposing lateral edges; and

adhesive coated areas (20), wherein said adhesive coated areas (20) have a total surface area of less than 50% of the total area of said wearer facing side (12),

wherein at least a portion of said mouth portion (16) is adhesive free;

wherein said peripheral portion (18) is provided with a discontinuous application of adhesive on said wearer facing side (12),

wherein said mouth portion is sufficiently rigid to keep a user's mouth closed, during sleep, after application of the anti-snoring device to the wearer's face,

wherein said adhesive free portion of said mouth portion (16) has an area of at least 10% of the total surface area of said wearer facing side (12),

a width of sheet, measured in the longitudinal direction, is in the range of 5 cm to 12 cm,

the lateral edges are smooth lateral edges, and

said adhesive is applied at least on an area of said peripheral portion corresponding to the user's perioral area above the superior lip and on an area of said peripheral portion corresponding to the user's perioral area below the inferior lip.