It's several ears that I regularly purchase spare Earfoams earplugs for either my Flares HD and Flares Jet II. This far they always proved the best in terms of comfort, feeling and durability. They seem to be made of a better quality foam. I also have a Truthear IEM for which I purchased some Inair spare earplugs as the nozzles are too big for the Flare Earplugs to fit. Well, they're close to crap. Annoyingly sticky and last nothing but are more expensive that Flare's ones.
A pity that Flare still didn't elect to produce Earfoams with different nozzle diameters and enter the market of 3rd party earplugs.
Definitely a comfort and audio improvement.
While I find these replacement tips OK, I prefer the original silicone versions that came with my jet 2 earphones rather than these foam ones. I have very small ear canals so I suspect this might have something to do with it.