A diaper that integrates multiple layers of different materials: at least one waterproof outer layer and at least one inner layer for absorbing the urine of a man who does not control urination of such urine, comprising a bag-shaped surrounding body, within which the group of penis and genitals of a man is housed wherein the surrounding body has a mouth adjustable to the starting junction of the group of penis and genitals, and so that the structure that delimits the mouth of the body integrates an adjusting device, such that in the application position of the surrounding body, such adjusting device generates an adjusted adaptation of such mouth against the starting junction of the group of penis and genitals.
