Self-supporting interface dressing

A self-supporting interface dressing formed from a thin layer of a composition comprising a hydrophobic matrix and having through holes, wherein said 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 600 to 900 parts by weight of a plasticizer, and
• from 150 to 450 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;
• said composition further comprises, in addition,
• hydrocolloid particles in an amount of less than or equal to 25% by weight relative to the total weight of said hydrophobic matrix;
• one or more substances selected from substances that have a favorable role in the treatment of wounds, bactericidal or bacteriostatic agents, painkillers or local anesthetics, and also anti-inflammatories, in an amount of between 0.01 and 20% by weight, relative to the total weight of the composition;
• one or more antioxidants in an amount of from 0.05% to 1% by weight, relative to the total weight of the composition.