Eartune Fidelity U

These run slightly smaller, for my usually medium to medium large size ears, this medium was just barely able to work. But they do! They are used on my simgot et142 iems, & they help them sound quite good. These should improve siblance, improve bass, improve clarity & bring back some details. I think these are an absolutely worthwhile purchase & you would be very happy with them being used on quite a few iems. They seal well & hiking with them has been pretty nice overall. These will thump better if they are the right size. The horn effect that happens as they are pressed in have a good flare out that shows off that effect very well. As you put the eartip in it spreads out at the opening of the tip & the oval shape indent becomes better at helping reflect sound to help with resonance. I can recommend these.