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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-04 · 6 min read · Independent comparison
• Mijusun Memory Foam Ear — biggest strength: memory foam (polyurethane) that expands and molds to your ear canal, giving a noise-isolating seal and a firm, anti-slip fit for Momentum TWS 3/4.
• Mijusun Memory Foam Ear — biggest trade-off: it's a niche, single-brand fit — 1:1 designed for Sennheiser Momentum 4 & 3 only, so if you don't own those earbuds it's useless to you.
• Klowcok Ear Tips — biggest strength: 12 pairs of soft silicone tips in three sizes (S/M/L, four pairs each, black and red), washable and easy to swap.
• Klowcok Ear Tips — biggest trade-off: silicone doesn't mold to your ear the way foam does, and the listing is aimed at specific JBL Endurance models, so fit depends on your exact earbuds.
• Who Mijusun is for: Momentum 3/4 owners who want a custom, all-day seal and more isolation.
• Who Klowcok is for: JBL Endurance Run 2 (wired), Peak 3, Peak II or Race TWS owners who want a pile of spares in one go.
Mijusun Memory Foam Ear is a replacement tip kit for one specific family of earbuds: Sennheiser Momentum True Wireless 3 and 4. The tips are built 1:1 for that housing, which is the whole point. When a tip is shaped to match the nozzle and the charging case, you get a seal that actually holds instead of one that shifts every time you open your mouth. The material is polyurethane memory foam — the soft, expanding kind that presses into your ear canal and then relaxes into a custom shape.
That foam is where the real benefit lives. A secure seal is what blocks outside noise, and better isolation is what makes bass sound fuller and vocals sound clearer. If you ride a train, work in a shared office, or just want your Momentum earbuds to feel planted during a run, foam does more for you than a stock silicone tip usually will. Mijusun also made sure the tips stay low-profile enough to drop straight back into the Momentum charging case, and the set comes with three pairs in L, M and S plus a small silicone storage box. A one-year warranty is listed too.
Who should buy it? Momentum 3 or 4 owners who've noticed their original tips have gone shiny, stiff or loose, and who want a softer, grippier seal without hunting for a new pair of earbuds. The anti-slip foam behavior is genuinely handy for commuting and workouts.
Who should skip it? Anyone who doesn't own Sennheiser Momentum True Wireless 3 or 4. This is not a universal tip. It's also not the pick if you want to experiment with dozens of spares cheaply — you get three pairs, sized properly, and that's it.
Klowcok Ear Tips goes the opposite direction: volume over precision. You get 12 pairs of silicone eartips — nine black and three red — split across small, medium and large, four pairs per size. They're made for JBL Endurance Run 2 (wired), Endurance Peak 3, Endurance Peak II and Endurance Race TWS. The silicone is soft and light, they're easy to swap on, and they're washable, which matters if you sweat in your earbuds and want to rinse the tips instead of replacing them.
The pitch here is simple. Silicone tips are the everyday workhorse of cheap TWS: they don't mold to your ear the way foam does, but they're durable, quick to clean, and cheap enough that losing one isn't a crisis. Effective noise blocking comes down to getting the right size seated properly, and with four pairs in each of S, M and L, you can actually find that size instead of guessing. Owning spares also means you can keep a set in your bag, a set at your desk, and a set on the earbuds.
Who should buy it? JBL Endurance owners who want a generous stock of replacements, anyone who prefers the feel of silicone over foam, and people who'd rather wash a tip than baby it. If you have kids sharing earbuds or you're the type who loses small rubber things constantly, 12 pairs is a genuinely practical buffer.
Who should skip it? Sennheiser Momentum owners — these aren't designed for that housing. And if your priority is maximum isolation and a molded, custom-feeling seal, silicone won't get you there the way foam does.
• Best for noise isolation and a molded seal → Mijusun Memory Foam Ear. The expanding polyurethane foam creates the tighter, more personal fit.
• Best for spare quantity and value per tip → Klowcok Ear Tips. Twelve pairs across three sizes is a lot of backup for one purchase.
• Best for Sennheiser Momentum True Wireless 3/4 → Mijusun Memory Foam Ear. It's built 1:1 for that exact housing and charging case.
• Best for JBL Endurance Run 2 / Peak 3 / Peak II / Race TWS → Klowcok Ear Tips. That's the compatibility list, and the sizes cover most ears.
• Best for washing and reusing → Klowcok Ear Tips. Soft silicone is easy to rinse and swap.
• Best for all-day comfort and workouts → Mijusun Memory Foam Ear. The anti-slip foam is designed to stay put when you move.
• Best for people who lose tips constantly → Klowcok Ear Tips. Four pairs per size means a lost tip is a shrug, not a reorder.
• Best for a tidy, case-friendly fit → Mijusun Memory Foam Ear. Low-profile tips that still drop into the Momentum charging case.
If I owned Sennheiser Momentum True Wireless 3 or 4, I'd buy Mijusun Memory Foam Ear. The molded foam seal is the single biggest upgrade you can make to how those earbuds feel and how much outside noise they shut out, and the 1:1 fit means it actually works with the case. If I were running JBL Endurance buds — or I just wanted a big, cheap pile of soft silicone spares for a secure fit for big head — I'd take Klowcok Ear Tips instead. Neither is a universal answer. Match the tip to the earbud you own, and you'll be happy.
what is tws earbuds
TWS stands for "true wireless stereo" — earbuds with no wire between the two buds. Both products here are replacement eartips for TWS models: Mijusun for Sennheiser Momentum 3/4, and Klowcok for JBL Endurance Run 2, Peak 3, Peak II and Race TWS.
how much is tws earbuds
That depends entirely on the model and the brand, so there's no single number. What matters here is that Mijusun and Klowcok are both accessory kits, not earbuds — check the current price on Amazon for each before you buy.
what is tws earbuds means
It means the left and right earbuds connect wirelessly to each other and to your phone, with no cable running between them. Because there's no wire, a secure, well-sealed tip matters more — that's the job both Mijusun's foam tips and Klowcok's silicone tips are made to do.
how to tws earbuds
Pair them in your phone's Bluetooth settings, then fit the tip that seals best in your ear. With Mijusun, the foam expands to mold to your canal; with Klowcok, try the S, M and L silicone sizes to find the one that blocks the most noise and stays put.
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