Method for manufacturing a cushion and cushion

A method for producing a cushion for an orthopedic device, the cushion having

• a first component comprising a first film layer and a second film layer, wherein the first film layer comprises at least one opening,
• wherein the first component is joinable to at least a second component such that there is at least one fluid-filled volume between the first component and the at least a second component,
• comprising:
• inserting the first film layer and the second film layer into a tool which has an upper mold and a lower mold;
• applying a differential pressure to at least one of the first film layer or the second film layer so that the first film layer or the second film layer to which the differential pressure is applied moves at least in sections towards the upper mold or the lower mold thereby creating a distance between the first film layer and the second film layer;
• and
• joining the first film layer and the second film layer along at least two connection lines that form at least one channel between the first film layer and the second film layer such that at least some fluid from the at least one fluid filled volume can enter a space between the first film layer and the second film layer through the at least one opening when pressure is applied to the at least one fluid filled volume, wherein the at least two connection lines are interrupted at least one point forming an outlet where the first film layer lies on the second film layer but where the first film layer is not joined to the second film layer at the at least one point, wherein under pressure at least some fluid in the space between the first film layer and the second film layer can pass between the first film layer and the second film layer at the at least one point.