Willow®
Wearable Breast Pump

Rated 4.0 out of 5
Based on 710 reviews

Meet the all-in-one breast pump that fits in your bra and goes where you go. Our patented, no-spill technology lets you pump smarter and fully hands-free.

More comfort. More control. And 20% more milk*.

Select a Flange Size (Sizing Guide)

Find Your Flange Size

with a ruler app on your phone

    Your flange size is based on your nipple measurement in millimeters. Use an app ruler for easy and accurate sizing

    • Download "Ruler 2.0" for iOS or "Millimeter" for Android phones.
    • In iOS app settings, set measurement to “mm”. For Android, select default calibration.
    • Stimulate nipple to perk it up
    • Place phone screen perpendicular to nipple. (Figure 1)
    • Nipple base should line up with the zero points in the corner of app screen (Figure 2)
    • Slide measurement bar on screen to opposite nipple base - that’s your nipple measurement. (Figure 3)
    • Use a flange that’s 2-4 mm larger than your nipple measurement. (Figure 4)
      • Willow Size Guide

        FRONTAL VIEW
        Hold phone
        perpendicular to nipple.

        Willow Size Guide

        TOP DOWN VIEW
        Use your finger to slide the ruler line to measure nipple.


        Flange Size Chart 4

        Find the right flange sized based on
        your measurements.

        Flange Size Chart
$499.99

Free Shipping on all Pumps.
FSA/HSA reimbursement eligible.
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Milk Storage Options

Pump Your Way

Willow is the only in-bra pump that gives you the flexibility to pump directly into spill-proof storage bags (24 included with Pump Kit) or reusable Containers (sold separately).

Milk Storage Options

Pump Your Way

Willow is the only in-bra pump that gives you the flexibility to pump directly into spill-proof storage bags (24 included with Pump Kit) or reusable Containers (sold separately).

What's New for Generation 3?

Willow Pump Generation 3

Re-engineered from the inside out, our Generation 3 smart pump offers more comfort and control – and helps you get more milk.

  • Slower, softer pumping rhythm designed for comfort
  • Smart Suction technology adjusts based on your preferences to increase output (no need to press a button)
  • Plus, a new app exclusively for Generation 3 with step-by-step onboarding and personalized pumping tips

  • Everything works inside the Pump and inside your bra, with no external tubes, cords, or dangling bottles to hold you back.
  • Milk flows into the self-sealing and spill-proof disposable collection and storage bag (an essential part of the Pump Kit) or reusable Container inside the Pump (Container accessory sold separately).
  • Smart, proprietary technology responds to your body and maintains suction similar to a baby, enabling true mobility without spilling a drop.
  • Lie down, bend over, play with baby, take a conference call… pump wherever the day takes you!
  • The only wearable pump offering the option to pump into either Milk Bags or Reusable Containers
  • The only wearable pump that is totally enclosed and spill-proof in any position, with self-sealing Milk Bags
  • Quiet for discreet pumping
  • Seven levels of suction comparable to most traditional double electric and hospital grade pumps, with two new lower suction levels and a new sensitivity setting
  • Smart Suction technology adjusts based on your preferences to increase output (no need to press a button)
  • New app exclusively for Generation 3 with step-by-step onboarding and simple, fast pairing – plus volume tracking, session history, and personalized pumping tips
  • Compatible with iOS (iPhone 6 or newer) and Android (supported models)
  • Only two parts to clean (dishwasher safe)
  • BPA free
  • Rechargeable battery lasts up to 5 pumping sessions to get you through the day
  • One year warranty

Willow comes with everything you need to get started:

  • (2) Willow Pumps
  • (2) 24mm or 27mm Flanges (21mm Flanges ship in a separate box)
  • (2) Flextubes™
  • (24) 4 oz. Milk Bags
  • (2) Cleaning Brushes
  • Charger
What are the new features for Willow Pump Generation 3?
We’ve re-engineered how Willow pumps to yield more milk per session - and offer more comfort and control. Generation 3 has a slower, softer pumping rhythm and a sensitivity setting for comfort, plus new Smart Suction technology that adjusts based on your preferences to help you get more milk. Compatible with our new app exclusively for Generation 3, which offers fast, easy pairing, step-by-step onboarding, and personalized tips.
How do I download the Generation 3 App?
Our Generation 3 App is available for iOS and Android. Please see list of compatible devices.
Do you offer financing?
Yes! We partner with Affirm to offer payment plans for the Willow Wearable Breast Pump. Learn more
Can I use my HSA/FSA?
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.
Is Willow covered by insurance?
Some women are able to obtain full or partial reimbursement for their Willow Pump through insurance. We recommend you contact your insurance provider to see if they will cover some or all of the cost of the pump.
Does Willow work with larger breast sizes?
Yes. Willow was designed to work with larger breast sizes including G and H bra cups. See our Sizing Guide for fit.
Do I need a special bra for Willow?
We recommend wearing Willow with a full-coverage nursing bra that’s stretchy and has a flap. Avoid underwire and padded bras.
What sizes are available?
Willow offers Flanges and Milk Container accessories in size 21mm, 24mm & 27mm. Unsure of your size? Visit our sizing guide.
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.

Awards & Accolades

average rating 4.0 out of 5
Based on 710 reviews
  • 5 Stars
    378 Reviews
  • 4 Stars
    154 Reviews
  • 3 Stars
    52 Reviews
  • 2 Stars
    51 Reviews
  • 1 Star
    75 Reviews
79% of reviewers would recommend this product to a friend
Customer photos and videos
710 Reviews
Reviewed by Meryll T.
Verified Reviewer
I recommend this product
Willow Pump
Gen 3
Rated 5 out of 5
Review posted

Pumping at any time

I wanted to share an experience I had with my willow pump recently. I am a certified nurse midwife and was on call in the hospital yesterday. I just sat down to pump with my traditional pump and got a call from triage that I had a patient who was completely dilated. Of course I got right up, unhooked from my pump, and ran to triage. My patient desired natural childbirth, so I wanted to stay by her side throughout labor to help her cope. My son is 3 months old, so frequent breastfeeding/pumping is necessary to maintain my supply. I asked a fellow midwife to grab my pump bag and left the room only for a minute to place my willow pump underneath my scrubs. I successfully pumped while helping a first time mom bring her sweet baby girl into the world unmedicated. Before having my willow pump I would have either had to go without pumping and risking clogged ducts, mastitis, and a decrease in supply, or ask another provider to help with delivery (which I would have hated since there is no greater honor than helping a momma bring her baby into the world). This pump has given me such a sense of freedom, and let’s me take control of my breastfeeding journey!

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Willow Pump

Awesome story, mama! Thanks for sharing!

Reviewed by Sarah B.
Verified Reviewer
I recommend this product
Willow Pump
Gen 3
Rated 5 out of 5
Review posted

Pumping on the go!

I am a mom of 8 kiddos, so I needed something that could work with my busy lifestyle. I work part time and breastfeed and pump for my new baby. Willow allows me to pump milk for my daughter wherever I am at and makes sure she continues to get breast milk even if I am not with her. I bought the containers that fit inside the pump and save the milk for future feedings. This pump is truly a game saver for moms in every situation I highly recommend this pump and happy I found it.

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Willow Pump

Wow, mama! So glad your Willow pump helps you keep up with your busy household!

Reviewed by Brittan R.
Verified Reviewer
I recommend this product
Willow Pump
Gen 3
Rated 5 out of 5
Review posted

Essential for twin moms!

I have a 22 month old and 2month old twins. This pump has saved me and my breastfeeding journey multiple times! Makes going out of the house easy, night pumps easy, doing things around the house easy as well. I’d purchase this pump over and over if I had to. Definitely worth every penny considering it has helped with my mental health and to keep pumping!

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Willow Pump

You've got your hands full, mama! Glad Willow is helping to make something a bit easier!

Reviewed by Julia k.
I recommend this product
Willow Pump
Gen 3
Rated 5 out of 5
Review posted

A must have

I am exclusively pumping for my twins. My husband went back to work and I was just plugging into the pump and praying no one needed me for 20 minutes 8 times a day. The willow has made it so I can pump and take care of my girls. I’m not sure how far our breastfeeding journey would have gotten without it!

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Willow Pump

We're SO glad to hear this! Yay for multi-tasking!

Reviewed by Clara C.
Verified Reviewer
I recommend this product
Willow Pump
Gen 3
Rated 5 out of 5
Review posted

First Time Momma

I love my Willow Pump! Not only did it help my milk production, but also made it super convenient to pump! We recently went to Hawaii on vacation and I was pumping everywhere! It made it super easy for me to pump while at the beach, at a restaurant or even on our scenic drives!

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Willow Pump

Hi Clara, We're so happy to hear this! I wish I was pumping on vacation in Hawaii! ;)