Late replying, but just saw your post. I find foam ear tips (Comply or the AC foams) to be uncomfortable and usually prefer silicon tips. My Comets came with the SpinFits, and I like them. I also have the Fianl E tips (came with my Io), and I think I prefer the SpinTips...they seems a bit more flexible and I find them to be more comfortable for longer periods than the Final E. I also purchased some inexpensive double flange tips from Amazon (generic brand). I find that the double flange tips provide a little better isolation than the SpinFits. I used the double flange tips this past week on an international flight and had them in my ears for 7 to 8 hours each way with no discomfort. I believe I can get a deeper insertion with the Comets than my other CA IEM's, and this seems to improve isolation; making them a good choice for travel. I had previously purchased some double flange tips from RHA, and like them on the Jupiters. I believe the double flange I purchased on Amazon (10 pcs for $6; Large) have a slightly larger bore than the RHA, but I can't say for sure as I do not have the RHA tips with me at the moment to make a comparison. Comfort wise no issues with either.