Willow 3.0 is now Willow 360! We changed its name because no other pump provides 360° mobility, making it possible to live life from every angle. In addition, moms who pump with Willow 360 have access to 360 Care, a personalized support program dedicated to supporting onboarding, sizing, and more. (What didn’t change? Willow 360 is still the only pump that’s Apple Watch-controlled and compatible with totally hygienic, self-sealing bags or reusable containers.)

Willow 360 is the only wearable pump that’s 100% leak-proof when using our Spill-Proof Milk Bags. There are other wearable pumps that imitate this in-bra design but do not offer 360° of true leak-proof mobility.

It's also the only in-bra wearable pump that offers two ways to pump and store your milk — choose from the leak-proof, self-sealing, ready-to-store milk bags, or reusable containers. The reusable containers are leak-proof up to 180°.

It can take a while to get the hang of wearables — and Willow 360’s leak-proof latch may feel different than what you’re used to. So we designed our support program to help set you up for success. It includes a virtual session with a Willow Mom Coach for personalized onboarding support, extra sizing inserts if you need them, and recommended content on all things pumping with Willow. Your Coach can also connect you with a lactation consultant from SimpliFed.



Getting started is simple. After purchasing your Willow 360, we’ll send you an email with instructions for scheduling your 1:1 appointment, as well as more detail about the program.

Willow 360 offers complete leak-free mobility when pumping with our Spill-Proof Milk Bags. With its patent-pending latch technology, you can pump in any position, from bending over to laying down. Willow Go does not offer the same 360° mobility — instead, it offers 45° of leak-proof mobility for moms who will not be moving as much when pumping.

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

Both pumps are app-connected, but Willow 360 is built with smart sensors that send real-time output information to the app — allowing you to track your milk volume while you pump. When pumping with Willow Go, you can enter your volume manually. Finally, you can manage your session from your Apple Watch when using Willow 360, while Willow Go can only be controlled via the app on your phone.

Check out our comparison page for more, or take our pump quiz to decide which pump is right for you.

Most moms get up to 40% (as much as $159) off their Willow 360 pump and accessories through insurance. Learn more about how to use your insurance benefits to save on your Willow pump here.

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.

Yes! We partner with Affirm to offer split pay and installment payment plans for the Willow Wearable Breast Pump. Learn more about our financing options.

No, Willow 360 is the only pump that offers the option to pump into Spill-Proof Milk Bags or Reusable Containers. Milk Bags enable total 360 degree mobility, while Containers offer 180 degree mobility (more than other wearable pumps!)

Our easy-to-pair app lets you control your pump and track your milk output in real time, plus view your breast pumping history. You can also access research-backed content and book sessions with experts for personalized pumping, feeding, and postpartum support.

The app is available for iOS 14 and higher and Android OS 10 and higher.

Check the list of compatible devices to see if your phone can be used with the Willow pump app.

Yes. Willow was designed to work with larger breast sizes including G and H bra cups. (Plus, your flange size and your breast size are not necessarily related, since pump fit is dependent on the width of your nipple, not the size of your cups!)


We strongly recommend measuring yourself to determine your Willow flange and insert size, as it might be different from other pumps you’ve used. You can book a virtual onboarding session through 360 Care for support with sizing, and to receive additional inserts if you need them.


Visit 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.

No. But Willow 360 works best with a pumping or nursing bra that’s snug and stretchy (no underwire!) with full coverage so just the top of the pumps peek out. Avoid bras with underwire or padding. The Daily Pumping Bra is designed specifically for Willow pumps, making it a great choice for optimal comfort and output.

We know every ounce matters when it comes to pumping and breastfeeding, so we engineer our pumps to optimize milk expression. Willow 360 has a suction range and strength (up to ~245mmHG) that is comparable with traditional double electric and hospital-grade pumps

Our Spill-Proof Milk Bags and Reusable Containers hold up to 4 oz of milk (8 oz total). Willow 360 automatically shuts off when your Milk Bag or Container is full. If you pump more than 4 oz in a single session, you can easily switch out the bag or empty the container and continue pumping.

Yes! Willow 360 is 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. Please review our warranty policy.

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.

Willow cannot be used with any charger that is not provided with the pump or purchased as an accessory from Willow. Usage of third-party charging accessories is unsafe, may cause serious damage to your pump, and will invalidate the warranty.

 Yes — and this is Willow 360's defining advantage. Its patented latch is the only one on the market that is 100% leak-proof in any position when used with the Spill-Proof Milk Bags. That means bending over to pick something up, lying on the couch, or moving through a workout without a single drop lost. No other wearable pump offers this.

Yes. Willow 360 fits fully inside the bra with no cords, tubes, or external motors — nothing is visible from the outside. You can control the entire session from your phone or Apple Watch without touching the pump. Its smart sensors automatically detect letdown and switch from stimulation to expression mode, so you don't have to manage settings manually during a meeting.

Willow 360 is the only wearable breast pump with built-in smart sensors that send real-time milk volume data directly to the Willow app — no manual entry required. You can watch your output update live during a session, review your history over time, and share data with a lactation consultant. This makes it especially useful for moms managing supply or tracking output across multiple daily sessions.

Willow 360's bags and reusable containers hold up to 4 oz per side (8 oz total). If you regularly produce more than 4 oz per session, the pump automatically shuts off when full — just swap the bag or empty the container and continue pumping. For moms who consistently produce more than 4 oz per side, the Willow Go® with its 7 oz container option may be a better fit.

Willow 360 has just two parts to clean after each session, and both are dishwasher-safe. For on-the-go sessions, the Travel Cleaning Pack includes everything needed to clean parts away from home. Replace pump parts every 90 days to maintain suction and efficiency — replacement parts are available directly on the Willow site.