REASONS TO BUY
Rechargeable battery
Wearable
Simple interface
REASONS TO AVOID
No timer
Cup can leak
Lacks strong suction
Momcozy S9 Wearable Breast Pump Review
A hands-free pump is tube-free, portable, and quiet but raises some concerns, such as suction power
Credit: Abriah Wofford
By Molly Bradac ⋅ Senior Review Editor ⋅ March 11, 2025
Contributions From: Juliet Spurrier, MD
RELATED: The Best Breast Pumps of 2025
Our Verdict
The Momcozy S9 Wearable Breast Pump offers portability and convenience with its battery-powered operation and lightweight design, making it one to consider for pump sessions on the go. We appreciate its soft silicone cups for added comfort. However, it has some downsides, including potential power reduction over time, inconsistent latch and milk expression, and a slightly whiny tone. The assembly can be finicky. This pump didn't deliver a solid performance; it had some weak points. We think it's less efficient than most competitors, so we believe you can pass on this option for one of those.
Our Analysis and Test Results
Momcozy specializes in producing breastfeeding and pumping gear designed to support and make life easier.
The measurement markings on the Momcozy cups are less noticeable than some other contenders.
Credit: Abriah Wofford
Efficiency
The Momcozy delivers an average of 0.20 oz of milk per minute, resulting in a total of 3.75 - 4.3 oz during a 20-minute pumping session. However, it wasn't all smooth sailing for this pump.
Our lactating tester didn't enjoy using this pump, experiencing lower output and efficiency. It seemed like she couldn't quite empty her breasts as effectively as she did with competitors. She noted, “I really wanted to like this pump, but it almost felt like it gave up before I did.” The pump struggled to maintain a consistent latch, and sometimes the nipple was pulled without a steady stream of milk flowing into the bottle.
We measured 230 mmHg suction strength at the maximum intensity level, which is shy of the claim of 280 mmHg. While our reading wasn't too far off, it didn't quite match the manufacturer's or more efficient competitors, closer to 270 mmHg.
The Momcozy fit well in our tester's bra without issues, but it's a little bulky.
Credit: Abriah Wofford
Comfort
The Momcozy is bulky for something meant to be worn inside a bar. It has a 24 mm flange size. It offers two massage and expression modes, each with five adjustable suction levels. This flexibility lets you customize your pumping sessions, and we imagine some moms will find this is enough.
The Momcozy cups are entirely soft silicone.
Credit: Abriah Wofford
The entire cup is constructed from soft silicone, which is a nice alternative to rigid plastic. You won't need a specific pumping bra with this pump, but it will likely peek out of the top of your bra. We noticed that synchronization between the pumps can be finicky to achieve. While it's not uncomfortable, it can feel a bit odd when they differ in timing. Our lactating tester stated, “I thought the silicone flange made it comfier than those with harder plastic flanges that were less form-fitting or forgiving.”
The Momcozy S9 user interface has no display. Instead, it has four buttons to control the pump.
Credit: Abriah Wofford
Ease of Use
This product would be more impressive if ease of use were solely based on simplicity. However, we experienced issues like leaky cups and seals. Breast shape or size could play a role, so some users may experience something different.
We appreciate that the user manual includes helpful visuals. It's not in-depth, but it is easy to understand and follow. Navigating the user interface is straightforward, with four buttons: massage mode, expression mode, power levels, and suction strength. The pump settings are easy to adjust, and you can cycle through the suction strength levels to select what works best. It lacks a timer, but it automatically shuts off at 20 minutes.
You can't see how much you have pumped while wearing and pumping with the Momcozy. During assembly, it takes a lot of effort to make sure everything is connected securely. If misaligned, the pump can detach from the base or impact milk extraction. We experienced both issues.
The Momcozy is incredibly portable and easy to stash in a purse or tote bag.
Credit: Abriah Wofford
Portability
The Momcozy is more portable than some, as it is designed to be worn in your bra and powered by a rechargeable battery. The battery provides up to 1.2 hours of use on a single charge. The pump weighs 0.5 lbs and is tube-free, making transporting it a breeze.
The Momcozy provides a convenient tube-free pumping experience. While the interface is user-friendly, it lacks a timer or a feature to track session details, which could be a downside for those who value these functions.
Credit: Abriah Wofford
Both pumps will need to be charged, and you need storage bottles for extracted milk, as the cups don't serve this purpose. While it operates quietly, it has a slightly whiny tone, particularly at higher power levels.
We could wash the Momcozy by hand as there were fewer nooks and crannies requiring specialized bottle brushes.
Credit: Abriah Wofford
Hygiene
This pump has a closed system, ensuring hygiene. Cleaning the components is straightforward; you can do it by hand or with a bottle brush. However, the trickiest part is the assembly, as parts must be aligned. While the task is somewhat tedious, it's not overly challenging with practice.
The Momcozy is a wearable breast pump that offers a hands-free, tube-free experience.
Credit: Abriah Wofford
Should You Buy the Momcozy S9 Wearable Breast Pump?
If you appreciate portability and tube-free pumping, the Momcozy S9 Wearable Breast Pump is an all-in-one contender that's budget-friendly and ready to hit the road. It doesn't require an app, which may be great for those who prefer a less techy product. However, there is a learning curve with the assembly process to minimize the chance of leaking. But, overall, we don't think it is the best wearable.
What Other Breast Pumps Should You Consider?
If you want the best portable option you can wear discreetly, then the Elvie Stride stands out. It features an intuitive app to control the pump remotely, and it logs valuable information. It also has a quiet motor, making it more discreet. While it isn't the most efficient of the pumps, moms who want the freedom of daily living while pumping love this pump and think the trade-off and higher price are worth it. Alternatively, if you need portability but not necessarily hidden pumping, the Baby Buddha allows freedom of movement and a budget-friendly price. While it isn't a hidden collection system as it comes, it can be paired with other cups for more options.
Manufacturer Video
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