Frequently Asked Questions
Our best-selling pump, powered by innovative ComfortFlow™ technology for more milk output. Customizable hospital-grade suction, app-controlled, and ranked #1 Wearable Breast Pump by Babylist, this top seller is perfect for multitasking moms. Kit comes with 21, 24mm flanges & 5 oz SplashGuard™ containers.
A must-have for every nursing mom: The only wearable in-bra manual pump with an ergonomic handle and hospital-strength, two-phase suction - no charging required. Includes 24 mm flange made of soft silicone for a smooth fit and optimal milk flow.
Meet the Breast Milk Cooler that cools faster and stays colder for up to 24 hours vs. leading milk coolers.* Plus, with new sizes, colors, and two ways to cool, this patent-pending Cooler safely and stylishly lets moms store milk wherever the day takes them.
*Compared to leading milk coolers in Eurofins 2026 controlled, third-party testing
The all-in-one cleaning kit for pump parts, bottles, and more. Just add your favorite soap!
Protect your pump on-the-go with our sleek, sturdy, and easy-to-clean carrying case.
Everything you need to prioritize breast care and comfort, catch every drop of hard-earned breast milk, and feed with more confidence. Plus, every purchase includes access to a virtual appointment with an International Board Certified Lactation Consultant (IBCLC), as well as a free digital feeding course.
Same high-quality bag, new top-quality tech. Our durable, leak-proof bags are now designed with a scannable, AI-enabled code to auto-input your milk bag information into your digital stash in the Willow app. However you choose to pour and store, you’ll finally have the control and peace of mind you crave.
Optimize breast milk storage with our new Breast Milk Bag Flatteners, designed to help you neatly and efficiently organize every last drop.
Find your perfect breast pump flange fit with a wide range of inserts designed for maximum pumping comfort and milk output.
Our silicone sizing inserts help to optimize output for moms who measure between 13 mm and 27 mm.
2 Hot & Cold Breast Therapy Packs and 2 fabric sleeves
Fabric sleeves made with 70% bamboo fiber + 30% cotton
For cold relief:
• Freeze for at least 4 hours. The pack will turn white when frozen.
• Place into covers before use.
• Apply for 20 minutes maximum per session.
• Test pack before making skin contact.
• Avoid using packs if you have sensitive skin, insensitive (numb) skin, or open wounds.
For hot relief:
• Heat the pack in boiling water or microwave. The pack will turn purple when warm.
• Place pack on breast.
• Apply for 20 minutes max per session.
• Test pack before making skin contact.
• Avoid using packs if you have sensitive skin, insensitive (numb) skin, or open wounds.
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Whenever you need to relieve engorgement, pain, or swelling (use cold) or while nursing or pumping to encourage letdown (use warm). Packs are reusable and provide 360° coverage.
The pack will turn purple when cold and white when warm.
Place the pack in your freezer for at least 4 hours. Once frozen, the pack will turn purple. Place it into a soft cover before using. Packs can be held in place in a bra. Apply for 20 minutes maximum per session.
Heat the pack in boiling water or microwave. Be sure to microwave packs individually, and for no more than 15 seconds. Overheating may damage or destroy the pack. When warm, the pack will turn white. If you prefer a warmer temperature, microwave in 5-second increments until desired temperature is reached. Test temperature before making skin contact, then place packs on breasts. Do not use packs for more than 20 minutes at a time to prevent injury.
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