Momcozy Flange Insert Compatible with Momcozy S9 Pro/S12 Pro

The Momcozy Flange Insert Compatible with S9 and S12 wearable pumps, available at Fed is Best, gives you the chance to refine how your pump fits without replacing your entire flange set. Small differences in nipple width can significantly affect how pumping feels, and inserts allow you to customise the tunnel size for improved alignment, comfort and performance.

Available sizes

Fed is Best stocks several sizes suitable for S9 and S12 pumps:

• 15 mm
• 17 mm
• 19 mm
• 21 mm

These inserts fit directly inside your existing S9 or S12 flange, reducing the internal diameter so that the nipple sits more naturally inside the tunnel.

Why correct sizing matters

A flange that is too large can draw in excess tissue, causing discomfort and reducing suction efficiency. A flange that is too small can create friction and irritation. Inserts allow for mid-sizing that may not be available through whole-flange replacements alone. They help ensure your nipple moves smoothly within the tunnel, supporting a more comfortable expression rhythm.

Support for changing needs

Nipple size can change during pregnancy, early postpartum and regular pumping. Inserts give you a flexible tool for adapting to those shifts. Many parents benefit from using different sizes on each side or from adjusting sizes as their routine progresses. Fed is Best encourages parents to choose equipment that supports their body rather than expecting one fixed size to stay relevant for every stage.

Care and cleaning

Wash inserts after every session in warm, soapy water, rinse thoroughly and allow to dry before reassembly. They can be sterilised according to Momcozy’s guidelines. As with all silicone pumping parts, replace them when they begin to stiffen, cloud or show signs of wear.

Building a supportive kit

Flange inserts work best as part of a well-organised pumping set-up. At Fed is Best you can combine inserts with spare collection cups, valves, storage bags and cleaning tools to create a streamlined routine. Whether you pump once a day or several times, having the right fit helps to make the experience more manageable.