They do balance out even harmonic signatures providing some better contrasting and odd harmonic flavor. The new SpinFit CP100+ (which I will add to this review soon) are medical grade silicone, so maybe they can make a difference for you.

It’s small enough to work with IEMs with smaller nozzles, like those on 64 Audio’s line of IEMs, but still big enough to stretch onto Noble or Empire Ears wider nozzles. Among the rest, the CP-360 should be in your stable if you’re into TWS earphones, they are one of the few TWS-specific eartip after all. This might help if you want to tone the bass down on some IEMs but for me this particular tip didn’t really have a permanent place on any of the IEMs I’ve tried them on. The CP100 is the best-selling eartips from SpinFit, being the original SpinFit that was sold since 2010. While the CP100 fits on the Empire Ears line of IEMs, it generally is a little tough to get on, while the CP155 and CP500 don’t provide a snug fit.From a comfort perspective, the CP360 are a bit weird because it’s as if you were putting them halfway in. Some suggested pairings for these tips: Westone, Shure, Etymotic IEMs with adapter, Meze 12 Classics V2 without adapter. It’s just a matter of habit, because they’re actually quite comfortable and some people may even find them more comfortable than “traditional” eartips exactly because of their shallower fit.

The silicone the CP500 are made of is slightly lighter and softer than the one used for the CP155, so I find them to be more comfortable as they adapt to my ear canals better. There is increased articulation and clarity, for example, in all frequency ranges with sharper defined transients and improved linearity.I’m pretty active, hiking and kayaking, so I don’t want them to plummet down a cliff or fall into the water.

The only two in-production models that I don’t have with me are the CP-155 (I don’t have a large-nozzle IEM at the moment) and the Airpod-specific CP-1025 (I don’t have an Airpod).Spinfit have been making eartips for a while now, and their claim-to-fame is the name-sake “swivel” mechanism that rotates the top of the inner-stem.