
Medela
Swing Flex Electric Breast Pump
7.5/10 overall£139.99
A single electric pump with an adjustable PersonalFit Flex shield that adapts to your shape for more comfortable, efficient expressing.
This is a more traditional pump in every sense - corded, single-sided, with a bottle collecting underneath - but that traditional approach pays off in expressing efficiency, where Medela's 2-Phase Expression technology (a faster stimulation phase followed by a stronger expression phase, mimicking a baby's natural feeding rhythm) delivers consistently strong, effective suction. The PersonalFit Flex shield is a genuine upgrade over older fixed-size flanges - it flexes slightly to accommodate breast shape and movement, which noticeably improves comfort over a long pumping session, and it comes in multiple sizes so you're not stuck guessing.
Against the Elvie, this is the less discreet, less mobile option - you're tied to wherever you can sit with the pump plugged in or on battery power, and the bottle-underneath design means you can't move around while expressing. What you get in return is stronger, more consistent suction that tends to empty the breast more efficiently, reflected in it outscoring Elvie on expressing efficiency in our comparison, and a significantly lower price.
A strong choice for parents expressing mainly at home, or exclusively pumping and prioritising output and efficiency over mobility. It's also the pump most commonly recommended by hospitals and lactation consultants, which counts for something if you want a well-trodden, well-understood option. Parents who need to pump on the go or discreetly around others are better served by Elvie's wearable design.
It is, by design, a sit-still product - you can't multitask or move around a room while using it the way you can with a wearable pump, which some parents find limiting once they're back at work or juggling other children. It also runs on mains power or an optional battery pack sold separately, so check you have that if you need full portability.
What we liked
- Strong, consistent 2-Phase Expression suction
- PersonalFit Flex shield improves comfort and fit
- Recommended widely by lactation consultants
- Significantly cheaper than a wearable pump
Where it falls short
- Corded and not hands-free - tied to one spot
- Single pump, not double
- Battery pack for portability sold separately
Specs
- Type
- Corded, single electric pump
- Noise
- Quiet but audible motor
- Power
- Mains, or optional battery pack (sold separately)
- Shield
- PersonalFit Flex, multiple sizes included
- Technology
- 2-Phase Expression
- Bottle capacity
- 150ml bottle included
How we scored it
Expressing Efficiency
Suction strength and how quickly and fully it empties the breast.
Strong, consistent suction; a favourite among lactation consultants.
Comfort & Fit
How comfortable the shield/flange feels over a full session, including fit adjustability.
The adjustable PersonalFit Flex shield helps, but it's still a fixed device to hold against you.
Portability & Discretion
Freedom of movement while pumping and how discreet the pump is to use outside the home.
Corded with a bottle underneath, so you're tied to one spot while pumping.
Weighted by importance for this category — see our editorial policy for how we test.
The alternative

Elvie
Elvie Double Electric Breast Pump
An ultra-quiet, wearable pump that fits discreetly inside a bra, letting you express hands-free wherever you are.