Let us know how it turns out—I’m rooting for a perfect fit!
Total game changer for me. I’ve got mine so snug, I literally go for runs in them. No slipping, no fiddling, just me, the Rex5, and main character energy
The AZLA Xelastec 2 same as galaxygrrl also recommended.
Ordered.
I just found this on AliExpress:
I think the orange ones are more stickier and the black ones are softer. Can you verify?
I grabbed those on Amazon for $10 and gave them a spin—you can totally return them if they’re not your thing. Here is the link. They took a long time to come.
The XELASTEC are very grippy but require more maintenance to properly clean. The Penons fit my ears very secure, are grippy and easy* to cleanI grabbed those on Amazon for $10 and gave them a spin—you can totally return them if they’re not your thing. Here is the link. They took a long time to come.
I liked them, but they didn’t beat the XELASTECs for me. They’re 9.2mm long—and anything past 8mm is where the Rex5 says, “nope.” It’s like trying to zip jeans that almost fit… close, but, they stick our for me.
Also… the orange against the green Rex5? It was giving traffic cone vibes. I know, I know, but....
@FullCircle - can you please make another color? How about a slick black.
You’re making the maintenance sound like a total PITA—but come on, it’s not that deep. Once every six months, you give them a 90-second spa day in boiling water. That’s it. No drama, just a little dip and done. Then, good as new.The XELASTEC are very grippy but require more maintenance to properly clean. The Penons fit my ears very secure, are grippy and easy* to clean
Edit eat to easy
| Feature | Acoustune AEX70 | AZLA SednaEarfit XELASTEC 2 | Penon Liqueur Silicone (Orange) |
|---|---|---|---|
| Material | SMP iFit® shape-memory polymer | Thermoplastic elastomer (heat-reactive) | Soft medical-grade silicone |
| Texture & Grip | Smooth, skin-like, non-sticky | Grippy/sticky, conforms to ear canal | Silky smooth, slightly grippy |
| Fit Behavior | Holds its shape, lightly compresses for comfort | Warms and molds to your shape | Wide bore, firm stem for stable insertion |
| Isolation | Moderate to strong | Strong (tight seal from stickiness) | Moderate (less seal than XELASTEC, but more open sound) |
| Sound Signature Influence | Open, airy mids and treble | Boosts bass and low-end richness | Brightens highs, slightly leaner bass, wide stage |
| Comfort (long sessions) | Very comfortable, non-fatiguing | Secure but can feel sticky or warm | Light and soft; some report pressure on deeper insertion |
| Durability | High – shape-memory resists deformation | Moderate – prone to deformation over time | High – silicone is long-lasting and easy to clean |
| Sizes Available | XS, S, M, L, XL (w/ case) | SS, S, MS, M, ML, L | S, M, L |
| Ideal For | Clarity, natural mids, treble-focused IEMs | Bass lovers, deep-seal fans, isolation seekers | Listeners wanting sparkle, detail, and wide soundstage |
| Price | ~$25 (2 pairs + case) | ~$19–30 (2–3 pairs) | ~$10–15 (set of 3 sizes) |
| Drawbacks | May lack low-end grip vs sticky or foam tips | Sticky feel, not ideal for constant removal | Wide bore may reduce bass; orange color is bold/subjective |
I like a quick and simple clean of eartips. An Ear swab and cleaning wipes. With the XELASTEC, cleaning them with paper or sanitation wipes leave string dust. As they are that sticky. Don't hate on the orangeYou’re making the maintenance sound like a total PITA—but come on, it’s not that deep. Once every six months, you give them a 90-second spa day in boiling water. That’s it. No drama, just a little dip and done. Then, good as new.
Plus, they are not orange.
On a more serious note—I did find that the extra millimeter made a noticeable difference for me. I must’ve gone through 10 to 15 eartips before landing on the right one
The black are possibly thicker and/or harder, they tell you on their website what each characteristic is.
... and I've barely even started down that rabbit hole.
Yep, LLMs get it wrong constantly—but in this case, if you check the size info on the link you shared, it clearly says 15.5mm.
OMG yes—same! I went full TWS detective mode and absolutely loved every minute of the rabbit hole.Loving all the tip notes.
I really wish tip rolling wasn't a thing, because it's a PITA, but it makes so much difference
But eartips? Total buzzkill. Full-on PITA and painfully dull. Like, the glamor ends and suddenly you're elbows-deep in silicone options and debating bore width like it's your job.
He could swap that and make an orange REX5 then you can put green tips on them and make have a fall pumpkin vibe! Annnd a little jack-o-lantern case cover for Halloween...I grabbed those on Amazon for $10 and gave them a spin—you can totally return them if they’re not your thing. Here is the link. They took a long time to come.
I liked them, but they didn’t beat the XELASTECs for me. They’re 9.2mm long—and anything past 8mm is where the Rex5 says, “nope.” It’s like trying to zip jeans that almost fit… close, but, they stick our for me.
Also… the orange against the green Rex5? It was giving traffic cone vibes. I know, I know, but....
@FullCircle - can you please make another color? How about an electric blue or slick black.
