faq

Questions about Willow?

Here's everything you need to know to make the most informed decision about your feeding journey.

Built better. Because you deserve better.

Willow pumps rival other traditional and wearable pumps with features that put moms first.

Hospital-grade suction

Fully in-bra with no cords or clunky motors

App-connected and controlled

Dishwasher safe with just a few parts to clean

Access to expert content and services

Top-ranked 24/7 customer care team

Here’s How We Compare

Willow Pumps

Traditional Pumps

Other Wearable Pumps

How to Pick a Pump

We’re here to help you understand your options (spoiler: there are many!) and pick the pump that will meet your needs without sacrificing your comfort or milk output.

New to Willow?

Our how-to articles, expert-led videos, and troubleshooting tips are designed to help you pump with confidence.

What to Actually Look for in a Wearable Breast Pump

Flange Sizing for Elastic Nipples: What Most Pumps Get Wrong

The data is in: Willow reduces burnout

Explore Our FAQs

Why Willow?

What makes Willow® pumps different from traditional breast pumps?

Willow pumps are unique because everything works inside the pump, inside your bra—no external tubes, cords, or dangling bottles. Plus, you don’t have to sacrifice performance. Willow 360™ and Willow Go™ offer hospital strength suction comparable to most double-electric and hospital-grade pumps - choose from seven levels of adjustable suction with Willow 360™, or nine levels with Willow Go. They’re also easy to assemble, clean, and app connected.

What are the differences between Willow 360™ and Willow Go™?

Willow 360™ offers complete, leak-free mobility when pumping with our Spill-Proof Milk Bags. With its gravity-defying continuous latch suction technology, you can pump in any position, from bending over to lying down. Willow Go doesn’t offer as full of a range of motion, but offers the same completely in-bra design and lets you pump totally hands-free and untethered. Willow Go’s “tug and release” suction technology is comparable to traditional pumps and other wearable pump brands.

Willow 360™ offers more milk storage options. It’s compatible with Spill-Proof Milk Bags and reusable Containers, while Willow Go offers Containers only.

Both pumps are app connected, but Willow 360™ offers smart pumping that tracks volume in real time and automatically records your session. Check out our comparison page for more, or take our pump quiz to decide which pump is right for you.

Sizing

What sizes do you offer?

Finding the right size is key to maximize comfort and output. Willow offers flanges in three sizes: 21mm, 24mm, and 27mm. If you measure equal or smaller than 21mm, we offer sizing inserts in five sizes (13mm, 15mm, 17mm, 19mm and 21mm) that snap into our 24mm flanges and containers.

How do I find the right size?

We strongly recommend measuring yourself to determine your Willow size, as our sizing may be different than other pumps you’ve used. Use our sizing guide or check out our exhaustive guide on how to measure your flange size, which includes pro tips from Willow’s lactation consultants.

Warranty & Returns

Does Willow have a warranty?

Yes! Willow Pumps are covered under a 12 month warranty from the purchase date, and pump accessories — all replaceable pump parts including but not limited to flanges, FlexTubes™, containers, milk bags, diaphragms, duckbills, chargers and sizing inserts — are covered under a 90 day warranty. Other physical products, including but not limited to bras, are covered under a 60 day warranty. Sizing Inserts should be replaced upon signs of wear and tear. Since breast pumps are single-user devices, use by more than one person, including purchasing second hand, will invalidate the warranty. Please keep your original proof of purchase from onewillow.com or an authorized retailer as it is required to exercise your warranty.

Will I still get help if my pump breaks?

Yes, if you have any issues with your pump, contact our customer care team for support. We’re here to help!