Abstract: Two-element wad with pneumatic damping designed for the cartridge industry formed by two interchangeable elements connected to each other and which consist of a case and a damper-shutter. The case incorporates a series of foldable flaps and a valve that regulates the damping and injects air. Both the case and the damper-shutter have crosssectional walls and a convexo-concave shape that can absorb radial deformations to the symmetry axis of the wad. The damper-shutter has a four-fold action: it withstands the flexion and deformation of the material, the friction against the walls, and the compression of the air contained in the damper-shutter.