Willow Go Wearable Breast Pump

With insurance, the Willow Go Wearable Breast Pump costs $84.99 to $279.99, depending on your plan. Plans add an upgrade fee for this pump. Check your coverage and we’ll tell you your exact cost before you order.

Up to 295 mmHg across 15 levels, Willow says: 6 levels in Stimulation mode and 9 in Expression mode. That is a higher maximum than the Spectra S1 and S2, which list 270 mmHg, and than the Willow 360 at 245. Compare maximums only; a higher number does not mean a pump empties better.

Assembly takes six steps, from Willow’s manual. 1. Press the duckbill valve onto the container back, lining up the tab. 2. Press the container back into the bowl, lining up the tabs. 3. Loop the Splashguard around the spout, fold it over and press it in. 4. Press the diaphragm into the pump, lining up the tabs; Willow says to listen for a pop, which is key for suction. 5. Press the flange into the assembled pump. 6. Press the assembled container onto the pump until it clicks.

Take it apart, rinse the milk-contact parts right away in warm water, soak them for 5 minutes in hot soapy water, then wash each part for 1 minute, rinse and air dry, Willow’s manual says. Before first use, boil the washable parts for 5 minutes. Willow’s cleaning guide puts them on the top rack of the dishwasher too, but says not to use a microwave or steam sterilizer on the flange or container. The pump motor is not washable: wipe it with 70 to 90 percent isopropyl alcohol.

Willow’s manual counts 6 washable parts: the flange, pump diaphragm, container bowl, container back, duckbill valve and Splashguard. Willow’s site says “5 parts,” so expect either number. Willow rates the washable parts at 3 months and says to replace sooner if they wear; the pump itself is rated for 12 months. Replacement parts are sold at onewillow.com; call or message us if you are not sure which one you need.

The box has 21 mm and 24 mm flanges and a nipple sizing tool. Willow sells 13, 15, 17, 19 and 27 mm sizes separately. Measure first, because a flange that is too small or too big cuts comfort and output.

Up to 8 sessions per charge, Willow says, and a full charge takes about 2 hours on a 5 V, 2 A USB charger (adapter not included). The pump will not run while it is plugged in, and it turns itself off after 25 minutes of pumping.

Willow doesn’t publish a decibel rating for the Go.

Willow describes the Go’s suction as “hospital-strength” and calls it a closed-system pump, and it publishes 295 mmHg as the maximum. We do not call it hospital grade; we describe it by that published number.

No. Willow’s manual says not to use the Go while lying down, and rates it leak-proof up to 45°, so you can move and lean but not lie back or bend all the way over. Keep your upper body upright, in a full-coverage nursing bra with a flap, and skip underwire and padding. For lying down, the Willow 360 with its sealed bags is Willow’s answer.

Switch to Willow’s 7 oz containers, sold separately. They hold up to 14 oz a session, the most of the two Willow pumps.

Most health plans must cover a breast pump under federal rules, and we check whether yours covers the Willow Go. Start your order through insurance, and we will tell you before anything ships if your plan covers a different pump.

The Go has the higher maximum (295 mmHg to the 360’s 245), holds more (up to 7 oz a side) and pours from reusable cups. The 360 adds sealed bags that stay leak-proof in any position, live volume tracking and Apple Watch control. The Momcozy M5 lists up to 285 mmHg, a little under the Go.