I have extremely weird ear canals and no, I mean absolutely NO in-ear earbuds will stay in my ears for longer than 15 minutes, even with the christmas tree earplug-style tips on them. For that reason I am relegated to either my bulky but beloved Sennheiser WH1000XM4 headphones (or, even less practical: my wired planar magnetics) or... airpods 3. Somehow despite trying every brand of "not-in-ear-ear-bud" a-la Airpods/Earpods I have found absolutely nothing that has the frequency response of Apple's design. The fidelity is nothing to write home about but I'm not missing any of the music. Even well-regarded "flathead" earbuds, conversely, simply have no response whatsoever below 120hz.
Not trying to convince your anything, just putting it out there for those that are plagued by this, but I had similar issues and memory foam tips solved this for me with airpods. For me they'll stay in if i'm basically motionless, but as soon as I move they're on the run.. With the foam tips I'm able to do basically anything and not worry about losing an expensive earbud.
I'm afraid to try expensive over the ear headphones again after a pair of XM3's started making the most hideous screeching noise right after the warranty expired.
Yes, same. But these ones don't have eartips, so we are going to have to wait for the Pro version if we want these.
Are the memory foam tips first party? Which ones did you get?
Sony.
Sony LinkBuds Fit
The comment you're replying to means that Sony made the XM4, not Sennheiser like the parent said.
Like you, I have weird ear canals, and I've always struggled with fit; the Apple ones are the worst.
I have the Sony earbuds, and while I agree they fit a little better, I find the memory foam disgusting. It also degrades over time and becomes brittle. My solution was the Alza SednaEarfit Max, which are silicone earbud tips that fit the Sony. They are easy to clean and come with the tiny mesh that prevents ear wax from getting into the electronic part of the earbud. Of all the tips I've tried, these stay the best.
However, they still fall out too easily if I'm eating (from jaw movements) or lying on my side.
PS. You mean Sony WH1000MX4. Not Sennheiser. Although Sennheiser makes the Momentum True Wireless, which comes with silicone earbud tips.
What about IEMs with custom earmolds?