The spinfit kinda of hard to get it fit to the nozzle as the opening was quite small. Plus I never like spinfit's silicon. Too flimsy. It keep collapse in my ear.
But when I do get a seal is pretty good. But I have to adjust like 8/10 times to get the right seal. Too much hassle. Plus it doest isolate that well due to the silicone being too thin.
I would actually wan them to make a spinfit tip with Ostry 100-300 kind of silicone on it. It would be awesome
Again, everything is subjective there as everyone have different ear anatomy.
So,
BETTER to test out every tip find the one that suits you well. :rolleyes: