Willow 360 Breast Pump Flanges 21mm - Leak Proof Replacement

In this review of the Willow 360 21mm breast pump flanges the bottom line is straightforward: these replacement flanges are for pumping parents who need a reliable, leak proof, wearable setup and want a clear, easy-to-clean fit option. The reviewer found the 21mm size useful for those who match Willow's size chart and appreciated the convenience of pairing the flanges with Willow's patented spill proof milk bags for truly hands-free, untethered pumping. Overall the flanges deliver on fit, visibility and simple maintenance.

Key Features

• Leak proof pairing: Designed to work with Willow's spill proof milk bags so users can pump without messy spills or adapters.
• Multiple sizes available: Offered in 21mm, 24mm and 27mm to help users find a more comfortable and efficient fit when referenced against Willow's size chart.
• Clear, convenient design: The transparent flange improves nipple visibility for proper placement and faster assembly with a quick snap closure.
• BPA free and dishwasher safe: Materials are safe for repeated use and can be cleaned in the top rack of a dishwasher for easier sanitizing.
• Compatible with Willow 360: Built to pair directly with the Willow 360 wearable breast pump so you can pump untethered, without cords or tubes.
• Limited warranty: Covered by a 90 day limited manufacturer's warranty for added peace of mind after purchase.

Who It's For

These 21mm flanges are best for parents who already own a Willow 360 or Willow 3.0 wearable pump and who have measured themselves against Willow's sizing guide. They suit people who prioritize a leak proof, portable pumping experience and who want a flange that is easy to see, remove and clean.

Those who should look elsewhere include people who do not use the Willow system or who require a flange size outside the available 21mm, 24mm or 27mm options. Also, anyone seeking flanges made from textured or colored materials will not find that here, as these are clear and designed for visibility and simple maintenance.

Pros & Cons

Pros

• Pairs with spill proof milk bags for a genuinely leak resistant wearable pumping experience.
• Clear plastic that makes nipple alignment and quick assembly easier during sessions.
• BPA free and dishwasher safe for straightforward cleaning and reuse.
• Available in three sizes to improve fit and comfort when the correct size is chosen.

Cons

• Fit depends on choosing the correct size from the chart, so sizing guidance is essential.
• Covered only by a 90 day limited warranty, which is shorter than some extended accessory guarantees.

Specifications

Product	Replacement breast pump flanges
Compatible with	Willow 360 and Willow 3.0 wearable pumps
Size	21mm (also available 24mm and 27mm)
Material	BPA free plastic
Cleaning	Dishwasher safe
Included	2 count pair of flanges
Warranty	90 day limited manufacturer's warranty

Our Verdict

The Willow 360 21mm flanges are a practical replacement for users of the Willow wearable pump who need a leak proof, easy-to-clean flange that pairs with the brand's spill proof milk bags. When sized correctly they offer good visibility, simple assembly and dishwasher-safe cleaning, making them a sensible value for parents seeking a truly untethered pumping option.

Frequently Asked Questions

Are these flanges compatible with my Willow pump?
Yes, they are designed to pair directly with the Willow 360 and Willow 3.0 wearable breast pumps.

How do I choose the right size?
Reference Willow's size chart to determine whether 21mm, 24mm or 27mm will provide the most comfortable and efficient fit.

Can I clean these in the dishwasher?
Yes, the flanges are BPA free and labeled dishwasher safe for easier cleaning.