Frequently Asked Questions
We did our best to think of (and answer) all the questions you might have about Willow®. But if you’ve got one that didn’t make the list, let us know so we can get our best people on it and get back to you.
How does Willow work?
The Willow Wearable Breast Pump is unique because everything works inside the Pump and inside your bra—with no external tubes, cords, or dangling bottles to hold you back.
First, you align Willow with your breast, wait for the Pump to initiate latch, and then secure it inside your bra. Once latched, Willow senses let-down and automatically switches to expression phase based on your individual milk production. Your milk flows into the disposable, spill-proof Milk Bag tucked securely inside the Pump – or into the reusable Milk Container that attaches to the Pump. And the best part is you can move freely while you pump and track your milk progress in real time on the Willow App.
When you’re done pumping, simply open Willow and remove the Milk Bag (which doesn’t leak, thanks to our innovative one-way valve) – then pour it right into a bottle or store it in the fridge or freezer for later. Or, empty your Milk Container into a bottle or your favorite storage container.
Why is Willow shaped like a breast?
We designed the Willow Wearable Breast Pump so it fits into your bra and looks like you (not a machine).
What sizes do you offer?
Willow offers 24mm & 27mm Flanges (used with our spill-proof Milk Bags). Our Milk Container is available in sizes 21mm, 24mm & 27mm. Unsure of your size? Our Sizing Guide can help.
What should I order if I measure 21mm?
We recommend buying the pump in size 24mm flange and the 21mm container so you can pump most comfortably. Currently we only offer the 21mm in the container option.
Do I need a special bra to wear Willow?
We recommend wearing the Willow Wearable Breast Pump with a full-coverage nursing bra that’s stretchy and has a flap. Avoid underwire and padded bras.
What does the Willow App do?
As the Willow Wearable Breast Pump works inside your bra, the Willow App displays what is happening. See things such as milk volume, pumping time and past pumping sessions. Compatible with iOS (iPhone 5 or newer) and Android (check if your Android smartphone is compatible here).
Which smartphones does the Willow App support?
The Willow App is available for iOS 11.x or later. Our Android App is compatible with these Android phones running Android OS Oreo 8.x or later.
- Samsung: Galaxy S7, S7 Edge, S7 Active, Galaxy S8, S8+, S8 Active, Galaxy S9, S9+, Galaxy S10e, S10, S10+
- Google: Pixel 1, Pixel 1 XL, Pixel 2, Pixel 3, Pixel 3 XL
- LG: G5, G6, G6+, V20, V30, V40, V50
Which generations of the Willow Pump are compatible with the Milk Container?
The Milk Container is only compatible with Willow 2.0, and attaches to the Pump with Willow 2.0’s quick-snap closure.
Am I able to use both the Milk Bags and the Milk Container with Willow 2.0?
Yes! Willow is the only in-bra wearable pump that gives you the flexibility and choice to pump directly into spill-proof Milk Bags or our new, reusable Milk Container. Switch back and forth – and choose what’s right for you!
Is Willow spill-proof?
Our Milk Bags are our completely spill-proof pumping option, perfect for pumping on-the-go. Pump in any position (we mean ANY position) without spilling a drop – then toss into a cooler bag, fridge, or freezer. Our unique one-way valve means milk goes in and doesn’t come out.
Can I breastfeed on one side and pump on the other?
Yes. The all-in-one design of the Willow Wearable Breast Pump makes it so you can pump while you breastfeed your baby because there are no external cords, tubes, or dangling bottles to get in the way.
Can I move around while I pump?
Absolutely! The Willow Wearable Breast Pump lets you move how you want to while you pump. Willow tucks into your bra so you can pump while you walk, multi-task, lean back, or relax. This makes everyday things like making breakfast or playing with your toddler totally doable. What you do while you pump is finally up to you.
Can I adjust the suction?
You sure can. The Willow Wearable Breast Pump has seven different suction levels in expression phase; so you can easily adjust the suction to your own milk flow and pumping needs.
How many ounces of milk does the Milk Bag or Milk Container hold?
Our Milk Bags and reusable Milk Container hold up to 4 oz. of milk.
What if I produce more than four ounces on each side?
Willow automatically shuts off when your Milk Bag or Container is full. If you pump more than four ounces in a single session, switch out the bag or empty the container and continue pumping.
Can I reuse the Milk Bags?
Willow Milk Bags cannot be reused. Our disposable, spill-proof Milk Bags feature a one-way valve so milk goes in and doesn’t come out. Store them in the fridge or freezer, and cut them open when you’re ready to pour them into a bottle.
How long does it take to charge Willow?
Once you’ve plugged the Willow Pump in, it takes about two hours to fully charge. If you can’t charge Willow for the full two hours, a 20-minute charge will last for approximately one pumping session.
How many pumping sessions can I get before I have to recharge?
A fully charged Willow Breast Pump will work for approximately five pumping sessions. A quick charge of 20 minutes is good for approximately one pumping session when you’re in a pinch.
Where can I get the most updated Instructions for Use?
How can I access the Instructional Videos?
You can view some of our Instructional Videos here, or in the Willow App.
Insurance & FSA/HSA
Is Willow covered by Insurance?
Some Moms have told us that they have been able to obtain full or partial reimbursement for their Willow Wearable Breast pump through insurance. Each insurance company has its own policy regarding reimbursement. Once you have your pump, the next step is to check with your plan administrator to see what you qualify for. We hear again and again that Moms don’t let insurance companies stop them from being hands free and getting time back in their day.
Can I use my FSA/HSA?
Yes you can. Simply pay for your breast pump, milk bags, and accessories using your FSA/HSA debit card at checkout, or pay with another credit card and submit your receipt to your plan administrator for reimbursement.
Can I pay on 2+ credit/debit cards?
Currently we accept one credit card per purchase. If you want to pay using your FSA/HSA and partially on credit card, you can pay with your credit card and submit your receipt for possible HSA/FSA reimbursement.
Do you offer payment plans or financing?
Yes! We partner with Affirm to offer payment plans for the Willow Wearable Breast Pump. Affirm offers an easy way to pay for your Willow Pump (plus any Milk Bags and accessories you buy with your pump) over time. A minimum purchase of $399.99 (before tax) is required to use Affirm.
Purchasing & Financing
Do you offer payment plans or financing?
Yes! We partner with Affirm to offer payment plans for the Willow Wearable Breast Pump.
What is the Affirm payment plan?
Affirm offers an easy way to pay for your Willow Wearable Breast Pump (plus any Milk Bags and accessories you buy with your pump) over time. A minimum purchase of $399.99 is required to use Affirm.
What is the interest rate on Affirm payments?
Interest rates vary between 10% and 30% APR. At times, we may offer 0% APR on selected plans. There are no hidden charges – no late fees, service fees, or prepayment fees.
How do I get approved to make payments on my Willow Pump through Affirm?
Follow the Affirm link on our website and enter a few pieces of information for a real-time decision. Checking your eligibility won’t affect your credit score. Affirm reviews the loan instantly and your shipment will begin processing immediately after you place your order.
How do I make Affirm payments?
Your payments will be made directly to Affirm – you can pay by debit card or ACH transfer, and can sign up for auto-payment at www.affirm.com/pay. Affirm will send you reminder emails when your payments are due.
What if I have more questions about Affirm?
If you have any additional questions, please visit the Affirm website, www.affirm.com/faqs.
Affirm payment subject to credit check and approval. Down payment may be required. Rates from 0-30% APR. Affirm is only available on orders over $399.99. Affirm loans are made by Cross River Bank, a New Jersey State Chartered Commercial Bank, Member FDIC.
Where can I purchase the Willow Wearable Breast Pump?
The Willow Wearable Breast Pump is currently only available for purchase on our website.
Can you ship Willow internationally?
Not at this time, but our goal is to get Willow into the hands of women around the world—so it’s something we hope to offer in the future.
Can I sell Willow in my store?
Thank you for your support. Please contact us at firstname.lastname@example.org so we can be in touch when we’re ready to expand.
Can I use the information on this site for medical advice?
We are here to help you pump successfully with the Willow Wearable Breast Pump; however, we are no substitute for medical professionals. Any advice or information provided on the Website is for informational purposes only and does not create a professional relationship, is not an aid to making medical decisions, and is not marketed, promoted or otherwise intended to be used to diagnose any disease or other condition, or to cure, mitigate, treat, or prevent any disease. The Website is not a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on the Website.