Disclosed is a contact layer for a negative pressure wound treatment system, in which the contact layer includes as inflatable channel with an opening for inflation or deflation of a fluid. The contact layer is flexible to be kept close to the intestines and to be possible to wrinkle or fold it in order to fit into the wound. To keep it in the desired position once this is achieved since the contact layer is thin and lacks rigidity and stability and may thus easily be dislocated, the contact layer allows the inflatable channel to be in an uninflated, or slightly inflated, state from the start to be able to easily wrinkle and fold the contact layer first and thereafter, during or after placing the contact layer in position, inflating the channel to increase the rigidity and stability to help to keep the contact layer in its desired position.
