Questions About Order

How long do orders take to be delivered?

The time frame of order delivery is divided into two parts:

●Processing time: 2 - 3 business days

●Shipping time: 5-15 business days (excluding weekends and holidays). For rural locations, allow up to 20 business days. Shipping rates subject to change.

Generally speaking, it only takes 7-9 days from delivery to receipt

Where is my order?

If your order status has been modified, please check your email, we have sent the tracking number to you.

If not received, please send an email to We will follow up your order

Change or cancel my order

We accept order cancellation before the product is shipped or produced. If the order is canceled you will get a full refund. We cannot cancel the order if the product is already shipped out.

Since we want to send your items to you as quickly as possible, we are generally unable to make changes to an order after it's been placed. However, you can send an email to to check the status of your order.

Missing part of order

Sometimes, we divide the order into several packages for delivery.

If your order status has been modified, please check your email, we have sent the tracking number to you.

If not received, please send an email to We will follow up your order

Never arrived?

Please send an email to with your order number

Report an Issue With Breast Pump


Here’s how to troubleshoot Momcozy’s leak problems:

(1) Leaking from silicone:

If the leak is coming from the edge of the silicone, your silicone might not be snapped in all the way. It’s also possible that your silicone is faulty or warped. **PLEASE NOTE** heat sterilizing or placing Momcozy washable parts in the dishwasher or microwave oven are not recommended.

Replacement shields here:

(2) Leaking from motor or collection cup:

If the leak is coming from between the motor and collection cup, it’s possible that the collection cup and/or motor aren’t fully secured. Another possibility is that the collection cup is cracked and the pressure from the suction is overflowing through the crack.

The solution, keep the correct posture, and then stick it with tape

(3) Leaking from the milk pour hole:

If the leak is coming from the pour hole, make sure the silicone shield notch and the collection cup notch are aligned when snapping the pieces together. If the holes aren’t aligned, leaking is likely through the hole(s).

(4) Leaking from flange hole:

If the leak is coming from the flange hole, it could be caused by leaning back too far. It’s also possible that your duckbill needs to be replaced if the slit is opened and allowing milk to travel back up, and into the flange during strong movements.

No suction?

If you are experiencing low suction, first check the valves and membranes: Separate the membranes from the valves. Inspect the valves and membranes for damage, including cracks, chips, holes, or tears, and make sure the pieces fit snugly and lie flat. If a part is damaged, discontinue use and purchase a replacement.

Motor not working?

Is the charging normal?

Can the duckbill valve close normally?

Please press the motor tightly in the palm of your hand and keep it for 10 seconds, if you feel the suction, maybe there are have some problem with the silicone accessories, please change the accessories


What is the suction level and duration of your use? Electric equipment will be hot, but the degree is different. The higher the level, the more power it consumes.


About this problem, The first step is to check whether the flange size is appropriate. If the flange is too large or too small, it will cause pain.

And then please try to adjust the models and suction levels. and before milking, warm the breast with a hot towel, massage to stimulate the areola, so that the breast is completely unblocked

Have noise?

When the motor is running, it is unavoidable that noise will be generated, which is normal.

Here’s how to troubleshoot Momcozy’s squeak problems:

(1) Keep dry before use

(2) The accessories are not damaged

(3) Please make sure that all accessories are installed correctly

(4) Ensure that there is no gap between the breast pump and the breast (it is best to wear suitable nursing bra and adjust the size)

However, if your pump is still making noise, please contact us so that one of our team can solve the problem for you.

Can't be charge?

Please check your power adapter, it must be 5V-1A or 5V-2A.

The S9/S10 breast pump will automatically turn off after 20 minutes of use, and you can choose to turn it on again to continue using it. It can be used for 80-90 minutes after being fully charged, of course, it depends on the level you set.

The S12 breast pump will automatically turn off after 30 minutes 

FAQs About The Bras

How do I know what bra size I am?

Your body’s shape and size can change rapidly during pregnancy and nursing. Each Momcozy product features a size chart to help you get the right fit, and our How to Size Guide Page is also a great resource. For bras, we highly recommend measuring your underbust and bust before ordering. If you need additional fit assistance, send us a message at

How do I know if the bra fits me well?

There are several things to look for in determining a good fit:

-The bottom band should sit straight across the back. If the band rides up, check that the straps are a proper length. If the straps are fine, tighten the band or try a smaller band size.

-The bottom band should be snug, but comfortable. You should be able to run two fingers underneath the band. If you can fit more than two fingers, tighten the band or try a smaller band size.

-There should be no puckering in the cups. If there is extra fabric around the cups, try a cup size smaller.

-The breasts should not spill out of the cups or the sides. If the cups cut into the breasts, bulge at the top of the cups or spill at the sides, try a larger cup size.

-The shoulder straps should sit comfortably at the shoulder. Straps should be slipping off, nor digging into the shoulder.

How do I wash and care for my bras?

To ensure your bras last for as long as possible, follow these steps when washing them:

1. To prevent twisting and tangling, close all hooks and clasps before washing

2. Wash with like colors – for example, beiges with whites and darks with blacks – to keep the colors true

3. We recommend handwashing in cold water. However, if you are using the washing machine, place your bras in a lingerie bag. To reduce fading and shrinkage, choose the delicate cycle and cold water

4. Avoid bleach as it causes fabrics to lose their stretch. If you really must use bleach, choose non-chlorine bleach.

5. To dry, hang it with the cups reshaped and the back hooked up. Avoid the dryer if possible, as dryer heat may damage the stretch

6. Please don’t iron your bra! The heat damages the elastic and changes the fit

FAQs About The Wearable Breast Pump

What is the difference between wearable pumps? S9/S10/S12

These are their differences:

The suction value and suction level of the S9 and S10 pumps are the same, but the exterior design is different, they have 5 suction levels. S10 is less noisy.

The difference between the S12 and the other two pumps is that it has a digital display, you can see the current pumping time, level and battery power, and other information. And it has 9 levels, allowing mothers to find a more suitable suction level.

The S12 is the latest model

How to sterilizing the pump accessories?

Clean washable components

1. Rinse in cold, clear water (approx 20°C / 68°F)

2. Wash in warm water (approx 30°C / 86°F) using mild dishwashing soap and wipe afterward with a clean cloth

3. Rinse with cold, clear water (approx 20°C/ 68°F) for 10-15 seconds

4. Place on the top shelf of the dishwasher

Sterilize washable components

Suitable for microwave, steam, or cold water sterilizing methods. We do not recommend microwave or steam sterilizing for more than five minutes.

Please be aware that some steam and microwave sterilizers reach high temperatures which may risk warping plastic parts. We do not recommend ultraviolet sterilization.

How often to replace accessories?

Some breast pump accessories do need replacing regularly to maintain performance. If you notice that your pump seems to have lost suction, the first thing you should do is take a look at your parts, particularly the valves, and inspect for wear, fraying, or stretching and replace if needed.

1. Valve membranes need to be replaced every 2 weeks to 2 months;

2.Duck valves need to be replaced every 1 to 3 months;

3.Backflow protector diaphragms need to be replaced every 3 to 6 months

4.Replace breast shields every 6 months

You can find them here:

The parts are only applicable to Momcozy wearable breast pumps, and other breast pumps may not be compatible.

How to find the right flange size?

Determine the diameter of your nipple. The standard flange size is often 24 mm, but you may need to select smaller or larger flanges based on your measurement.

Compare the diameter of your nipple to the available options.

Visit our Size Guide

Does the breast pump automatically shut down?

The S9/S10 breast pump will automatically turn off after 20 minutes of use, and you can choose to turn it on again to continue using it. It can be used for 80-90 minutes after being fully charged, of course, it depends on the level you set.

The S12 breast pump will automatically turn off after 30 minutes

How long does it take to charge?

The service life of the battery is 2 -3 years, but as the use time increases, the durability of the battery will decrease. Normally, It takes 2.5-3 hours to charge once, it can be used for 80-90 minutes under full power

Sucking posture

The correct sucking posture is to sit sucking, lean forward 45 degrees, and keep the container upright after sucking. In addition, parts are also recommended to be replaced within 1 to 2 months.

Other tips

Take out the pump: Tilt it forward 45 degrees and take it out. If it is a nursing bra, it is best to untie the detachable clip. When there is enough space to take it out, it will not touch the silicone flange.

Pour milk: flange entrance upward