Medela Harmony Flex Manual Breast Pump

Single manual breast pump perfect for mums who express occasionally and need a lightweight travel companion.
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Harmony™ Flex™ is a single manual breast pump, perfect for mums who express occasionally and need a lightweight travel companion. Now with the Flex™ technology.

It is perfect for busy schedules, as a backup to your electric pump, or for occasional use if you normally breastfeed your baby. Small enough to fit into your handbag and with no need for batteries or wires, mums love their on-the-go hand pumps.

Choosing the right size breast shield/flange 

Using the wrong sized flange results in a painful and uncomfortable pumping experience and can make your very expensive pump produce as much milk as if you were using an $80 no-brand pump.

Breast shield sizing is more of an art than a science and depends on the diameter of your nipples (both before and after pumping) and the elasticity of your areola. The easiest and most effective way to get the right size flange is to have a Lactation Consultant watch while you pump, trying various sizes (I love Alona and she does home visits!).

The first step is to measure the diameter of your nipples when they're relaxed (not when they're contracted and hard), then buy N+2-to-3mm and N+4-to-5mm shields. Typically, your nipples won't both be the same size.

For example, if your left nipple measures 20mm in diameter, try the 22mm or 23mm shield and the 24mm or 25mm shield (for each pump brand, not all sizes will be available - eg. we don't have 25mm shields for Medela, but we do have 25mm shields for Spectra). If your right nipple measures 23mm in diameter, try a 25/26mm shield and a 27/28mm shield. If there's overlap in the shields you need to try for each breast, such as in this example, that's great. The mother in this example would only need to buy three shields: 22mm (to try for left breast), 25mm (to try for both breasts), 28mm (to try for right breast).

Once you've worked out which size fits your breast best, you can buy extras as needed.

If this does your head in, contact us, tell us your nipple diameters and pump brand and we'll help you cart the correct shields.

  • Compact, light and portable: take the Harmony™ anywhere you go
  • Discreet & quiet: pump with it confidently anytime and anywhere
  • PersonalFit Flex™ breast shields: for increased comfort and more milk1
  • 2-Phase Expression technology: its unique handle helps you mimic your baby’s natural suckling rhythm2,3
  • Simple to use: intuitive and ergonomic design
  • Easy to clean: stripped-down assembly and disassembly, also washing and sanitizing Harmony™ is child’s play

Here's a short how-to-use video from the manufacturer for the Medela Harmony Flex Breast Pump:

Download the Medela Harmony Flex Manual Breast Pump instruction manual.

To register your Medela product, please fill in the Medela Warranty Form

This product has a limited returns policy for both change-of-mind and warranty coverage. We encourage you to contact us to ensure that this product is suitable for your family prior to purchase. For more information on our returns policy, visit our Returns Policy page