A two-way damper is provided including a retaining member and a baffle. The baffle comprises a flexible member with a first portion secured and held in a fixed position by the retaining member and a second portion normally oriented in a first position, but free to move relative to said first position. The baffle also comprises a third portion, arranged between the first and second portions, being flexible and resilient and allowing the second portion to move to a second position relative to the first position upon the application of a pressure differential across the baffle above a threshold pressure and causing the second portion to return to the first position upon the application of a pressure differential across the baffle below the threshold pressure.