AZLASednaEarfit Crystal Standard 3 Pairs (Size SS/S/MS 3Pr)

These are really good quality tips. The material feels more grippy than regular silicone tips, such as those which come as standard with Sennheiser Momentum True Wireless 2.They are quick to insert. I have to adjust these much more rarely than the stock tips, and the seal is better, providing better passive noise cancellation. Also, ANC for low frequency noise is not negatively impacted with my particular earphones since they produce a similar sound signature as stock tips (I settled on same EQ setting for both.)One of the big strengths of these tips is that they are available in sizes that differ only by 0.7mm, allowing for a better fit in both ears. (The large tips with MTW2 are 14mm and medium are 12mm - a much larger gap.)However, I would only suggest getting a 3-size pack if you know that your left and right ear canals are noticeably different sizes. Then you should end up with 2 useable pairs of ear tips.Otherwise, I think you should just measure the current tips you use, and maybe measure and try a size larger and smaller in the stock tips. This should give you an accurate idea of which size will work best. For example for MTW2, I'd recommend:L (14mm) - Stock L just about seals but you wouldn't mind slightly larger. Stock M feels much too small.ML (13.3mm) - Stock L fits nicely, or maybe very slightly too large, stock M feels loose.M (12.6mm) - Stock L way too big, Stock M fit, but maybe prefer a little larger.MS (11.9mm) - Stock M fits but is very snug.S (11.2mm) - Stock M fits but is tight. Stock S feel too smallSS (10.5mm) - Stock S is closest to good fit, but maybe a touch small. If you use Stock SS I'd suggest looking at SS size in TWS version of these tips which are shorter in length.This way you can just go for the 2-pack of the same size and get much better value. Just go with the one that measures closest to what you know works for you.These won't fit in all charging cases (see TWS version), but large comfortably fits in MTW2 case.And vs Xelastec, Xelastec had better isolation and security of fit (they feel glued in!). I also found them just as comfortable but personal experience will vary more with these compared to Crystal, which everyone should be happy enough with. (People with very sensitive ears may find Xelastecs more itchy.)Also, I thought the Xelastecs altered the sound signature more noticeably, reducing bass and adding sparkle to treble. This can be a good thing, I think it helps with MTW2, but won't work for everyone. Also, it means that although passive noise isolation is better, active noise cancellation isn't quite as effective due to some of the anti-noise being absorbed by ear tips.And finally, Xelastecs seem much less durable, maybe months? Compared to Crystals lasting several years.Expensive, but improved fit, comfort and especially isolation meant I was not unhappy at making the purchase.

-Bought these for the Sony WF1000XM4. They fit.-In the small box, you will find the tips along with some adapters which are not needed for the Sony.-I wear size M original tips, with these I use S and MS.-The silicone tips are grippy.-They are not as comfortable as I had imagined.-Personally, cannot comment on how they affect the sound.-They are alright, not a disappointment but also nothing special in my view.

They are good and give a good seal but not that much better than some other brands to warrant being three times more expensive

Great alternative to foam and hard silicon. Comfy to wear. I found the sound was enhanced slightly.