The present invention relates to a self-supporting interface dressing formed from a thin layer of a composition comprising a hydrophobic matrix and having through holes.According to the invention, this hydrophobic matrix comprises:per 100 parts by weight of a styrene-saturated olefin-styrene triblock copolymer having a viscosity between 0.2 and 2 Pa.s, as measured in a 10% (weight/weight) solution in toluene；from 400 to 1220 parts by weight of a plasticizer, preferably a plasticizing oil； andfrom 0 to 720 parts by weight of petroleum jelly；it being specified moreover that:the total amount of plasticizer and petroleum jelly is greater than or equal to 750 parts by weight；the amount of petroleum jelly is between 400 and 720 parts by weight when the amount of plasticizer is between 1000 and 1220 parts by weight.Application: treatment of wounds
