As someone who's been through the flange-size guessing game, these inserts are a lifesaver. I've used them with my Elvie Stride and Momcozy S12 Pro, and the difference is night and day. The transparent silicone makes it easy to monitor nipple positioning - no more awkward angles or painful misalignments.

What surprised me most was how they transformed my pumping sessions. Before discovering these, I'd dread pumping because of the discomfort. Now? I actually look forward to it (well, as much as one can). The 11-size variety means I can adjust as needed throughout my breastfeeding journey - because let's be real, our bodies change constantly postpartum.

The cleaning process is simple - just warm soapy water does the trick. Though fair warning: they do have that distinct new-silicone smell at first. It fades after a couple washes, but might catch you off guard initially.

Pro tip from experience: really push them deep into your pump flange. When I didn't insert them fully at first, they'd shift during use (ouch!). But once properly seated? Perfectly comfortable through entire sessions.

For any mom struggling with flange fit or output issues, these affordable inserts beat buying multiple expensive flanges. They helped me identify my ideal size before investing in permanent flanges - a game-changing discovery recommended by my lactation consultant.