From the perspective of comfort, although they’re nowhere near the level of triple-flange tips, it still takes a bit to get used to them. They’re much longer than the other earphones and therefore get deeper in your ears, which may be a bit unsettling. I found it’s also a matter of inserting them at the right angle, as otherwise they become very uncomfortable and don’t sound good. If you get the insertion right, though, you get a great level of comfort. I find it inferior to the single-flange tips, but great for dual-flange ones. SpinFit CP360 The big difference in most of the models is the size of the bore for the IEM nozzle. Generally you want a tip that’s easy to get on, but not TOO easy to make sure that you have a tight secure fit. The more secure the fit, the better your isolation will be, but if you go with something that’s too snug you’ll risk damaging the eartips when you take them on or off. The CP240 is a double flange eartip. Double flange eartips are useful for listeners who have larger ear canals and have a hard time getting a good seal. They can also provide improved isolation in general. On the CP240, the SpinFit pivot comes in between the first and second flange, to provide flexibility at the top for the second flange. The SpinFit CP360 are the first tips SpinFit developed specifically for “true wireless” earphones: they’re much shorter than the others because they need to fit in the cases, which often offer very little space for eartips. This means they can’t count on the depth of the insertion to give you isolation and have instead to rely on width: the ear canal is larger at the entrance and so these eartips need to be wider to seal it. In fact these are among the few SpinFit models to offer an XL size (on top of L, M, S and SS) and that’s because of this. The L size is 13 mm in width and 8.5 mm in height, while the XL is even larger at 14 mm wide and 8.5 mm high. They are basically shorter CP100! That’s also true when you look at their shape, which is similar but more compact. The inner diameter is 3.6 mm.

SpinFit eartips have been one of our favorites here since first trying out a pair that was bundled with the DUNU Luna. The main appeal is that they have the comfortability of silicone tips, but provide a better seal than the average silicone tip due to their namesake patented swivel technology. Basically, there is a joint near the top of the eartip (the part inserted into your ear) which enables it to bend and conform more completely to the shape of your inner ear. The SpinFit CP100 are the basic model, which by shape and feel most closely resemble “standard” eartips. They are conical (a wide ogive, to be exact) and offer a diameter of 4 mm which fits most earphones (including the Campfire Audio Vega 2020 and Dorado 2020, the Thieaudio Legacy 4, the Tin HiFi T2), but which is also a bit tight for earphones with larger nozzles. Still, they’re the ones that will probably fit the larger number of earphones, as they do just fine even with those that have a smaller nozzle like the Legacy 4. They come in 5 different sizes: SS (XS would have probably been better), S, M, L and XL. The SpinFit CP100+ (or CP100 Plus) are the exact same as the CP100 in terms of size, but they are made with a different material. They keep the same diameter of 4 mm and the same variety of sizes (SS, S, M, L, XL), but they are made of medical-grade silicone and feature more subdued colours and a more transparent dome. The SpinFit CP800 were the only ones I could not try due to not having compatible earphones: they are made for super-thin nozzles like those used by Shure, Westone and Etymotic. At just 2 mm wide, the inner bore is too narrow to house earphones with 4 mm nozzles (believe me, I tried). I will update this review as soon as I lay my hands on compatible earphones, but I expect them to behave exactly like all other eartips in this list. SpinFit CP1025Let’s look at the different SpinFit models, and compare how they fit on a selection of IEMs. Note that the sizing within each model (Small, Medium, Large) only affects the width of the flange and how that fits your ear, and does not affect the size of the bore or how well they will fit on different IEMs. CP100/CP100+ The SpinFit CP1025 were made to fit the Apple AirPods Pro thanks to an included adapter. The adapter is in fact an add-on that you can ignore completely if you use other earphones, and the CP1025 work just as well. In fact I think SpinFit should market this model not just for AirPods Pro as it – surprisingly – is also the one that I found to work best with other TWS as well, even more than the CP360. Update: SpinFit has actually done so, making the CP1025 available without the adapter and as more general TWS eartips. The CP1025 have an inner diameter of 3.6 mm and an outer diameter of 12 mm, with a height of 6.7 mm. There are four sizes available: L, ML, M and S. Eartips do make a difference in our listening experience. They may not always have an influence on sound, but they do change the way you wear your earphones and this makes all the difference between listening to music while being comfortable and doing so while swearing against the pain in your ears. The SpinFit line-up is quite complete and gives you a lot of choice to get the eartips that better suit your needs, from very deep insertion to a very shallow one. All of them offer a great level of comfort, thanks to the soft silicone and to the incredibly clever design SpinFit came up with. SpinFit eartips are a game changer and can completely change (in a very positive way) the way you experience your favourite earphones. W1 offers a similar fit to CP145, but updated materials and design to generate less pressure inside the ear while delivering a secure fit and seal.

SpinFit told me that the silicone in this case is “edible grade”, so even though it’s probably best to not put these over your pasta you probably won’t have any allergic or otherwise adverse reactions to it. SpinFit W1 The basic idea underlying every SpinFit eartip model is the following: traditional eartips have a straight solid core at their centre which stays so independently of the actual shape of the ear, but it would be better if the core could bend and follow the curves of the ear canal. This is what happens with the SpinFit tips: there is a point in which the silicone is thinner and therefore softer and it’s shaped like a doughnut, so that it can bend and provide better comfort.Soundwise, the CP155 are neutral and I can’t hear significant differences when compared to the CP100. If anything, the better seal allows bass to get further down, but it’s a minimal difference which is highly dependent on the earphones you are listening to. SpinFit CP240 The mids are clean and uncolored, but I still prefer the mids from the Xenns Top because of its technical abilities, clarity, and control. When compared to the Khan, I prefer the Khan's mids because of the dynamic driver tonalities. Both the Xenns Top and the Simgot EM6L have a balanced armature tone to them.

As a last bit, the silicone is actually medical grade, so the added benefit is you shouldn’t have issues with allergies and other adverse reactions. SpinFit CP500 The main differences with the CP360 are the height and the radius: the CP1025 are shorter and slightly narrower (12 x 6.7 mm vs 13 x 8.5 mm), so they don’t go all the way inside the ear canal but manage to seal it effectively thanks to their wide radius. This also means that they fit most charging cases better, as they are shorter. Everything else is the same as on “normal” silicone eartips, which is also why the SpinFit tips are so great: you get all the pros (good isolation, washability and basically eternal durability, wide compatibility) with none of the cons. When I started using in-ear headphones, around a decade ago, one of the things that I didn’t like about the experience was the eartips. They were just too uncomfortable compared to classic earbuds with foams. Sure, they provided better isolation, but having very sensitive skin I often found myself with irritated ears. Then I discovered foam eartips and that changed things completely, as they were much more comfortable, as isolating as the silicone ones and less prone to cause irritation. So I basically stopped using silicone tips – why bother when the foam ones were so much better for me? But one of the realities of life is that things change, sometimes for the worse and (thankfully) sometimes for the better, and man did my perception of silicone tips change when I discovered the SpinFit tips.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. The CP-500 is a specialist eartip that can be unpredictable, and being the widest-bore tip in Spinfit’s lineup offers something unique. Finally, the CP-240 is something I couldn’t find a use for and the CP-800 didn’t perform as well as the tips it’s supposed to replace (for me). So these two don’t excite me as much.