A system for applying a vacuum to a breast and a breast pump using the same

A wearable system for applying a vacuum to breast of a user, comprising:

• a first, elastically deformable, membrane for positioning over the breast, for defining a milk collection volume over the breast, wherein the first membrane is manually deformable to reduce the size of the milk collection volume such that an elastic restoring force generates a reduction in pressure;
• and
• a one-way valve for allowing release of air from the milk collection volume, characterized in that the wearable system further comprises:
• a second, elastically deformable, membrane positioned over the first membrane, wherein the second membrane is manually deformable to induce the manual deformation of the first membrane;
• and
• a space between the first and second membranes is vented to the surrounding atmosphere to allow the second membrane to return to its default shape without generating a reduction in pressure.