I always seek out and buy Comply foam tips if they are available for my earphones. They make a marked improvement to the sound and are very comfortable.
Bought a pair of Panasonic RZ-S500W that came with 3 sizes of silicon tips that unfortunately for me just will not hold the earphones in the ear, opted to buy the 3 size pack which include S/M/L the medium sized ones seem to form perfectly to my ear and keeps them in place, very satisfied with my choice of Comply Truegrip, will try the other sizes before ordering again but the Medium sized ones are doing the job, free postage and arrived as expected, no qualms in ordering again
Made my buds even more comfortable 👍
They are an improvement over the manufacturers tips, but quite difficult to fit as they are very tight. They are also not very big, even in the large size which is probably to get them to fit in the earphone case, but still a shame