How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a complete, self-contained earplug kit that works for sleep, focus and loud social settings straight out of the box, choose Beinkap 2; if you need fresh replacement tips for your Soundcore Sleep A20 or A30 earbuds, choose Klowcok Replacement Ear Tips. These two products get compared a lot, but they solve different problems: one is a standalone noise-reducing earplug system, the other is a consumable accessory that keeps an existing pair of sleep earbuds going.
• Beinkap 2's biggest strength: a full kit built around up to 28 dB of noise reduction — two pairs of earplugs, six sets of silicone tips in S/M/L, a storage case and guidance tips, with a 12-month warranty.
• Beinkap 2's biggest trade-off: it is a fixed-noise-reduction earplug, not an electronic bud — there is no audio, no app, no battery, so it only does one job (though it does it in many situations).
• Klowcok's biggest strength: it restores the fit and seal of Soundcore Sleep A20 / A30 earbuds with 12 silicone tips across three sizes, so you are not replacing the whole earbud when a tip wears out or gets lost.
• Klowcok's biggest trade-off: it does nothing on its own — without a compatible Soundcore earbud, these tips are just spare silicone, and they are only listed as compatible with the Sleep A20 / A30 family.
• Choose Beinkap 2 if you want one purchase that covers sleeping, studying, work, concerts and parenting noise.
• Choose Klowcok if you already own Soundcore Sleep A20 or A30 earbuds and your tips are worn, torn, uncomfortable or missing.
Beinkap 2 is a noise-reduction earplug set, and the headline number is 28 dB. That figure matters because it sits in the useful middle ground: enough to take the edge off a loud room, a snoring partner or a busy commute, but not so much that you feel sealed off from the world. The brand's own framing is that you can still communicate with people around you while wearing them — that is the whole point of this style of plug. If you have ever worn foam plugs at a concert and hated how muffled everything sounded, this is the alternative: the sound gets quieter, but the shape of it stays recognizable.
The kit itself is unusually complete for this category. You get two pairs of earplugs, six sets of soft silicone tips split across small, medium and large, a portable storage case and guidance tips, all in recyclable packaging. That means two people can share one box, or one person can keep a pair at home and a pair in a bag. The silicone is described as flexible and soft-touch, and the ergonomic shape is designed so side sleepers can lie on their ear without a hard plastic edge digging in. They are reusable and washable, which is the practical argument against buying disposable foam over and over.
Who should buy it: side sleepers in noisy households, students and remote workers who need to concentrate, people who go to concerts or loud social gatherings and want to hear the music without the ringing afterwards, and parents who need to take the volume down a notch while still hearing what is happening in the next room. The three tip sizes and the "go bigger if it falls out, go smaller if it hurts" guidance make it easy to dial in a fit without guessing.
Who should skip it: anyone who wants to play audio, take calls or track sleep through an app. Beinkap 2 makes no sound and pairs with nothing. It is also worth noting the listed dimensions are small — roughly 0.55 x 0.55 x 0.98 inches per unit — so if you need something that sits deep and completely vanishes, that is a personal fit question you will only answer by trying the sizes. And if you already own Soundcore sleep earbuds, buying a separate earplug set may be redundant unless you specifically want a no-electronics option for sleep.
Klowcok Replacement Ear Tips are exactly what the name says: spare silicone tips sized for the Soundcore Sleep A20 and A30 earbuds. You get 12 tips in total — six pairs, two pairs in each of small, medium and large. The earbuds themselves are not included, and that is the single most important thing to understand before you buy.
The logic here is simple and, in my view, underrated. Earbud tips are the part that touches your ear canal, collects wax, stretches out over months of use and eventually stops sealing properly. When the seal goes, noise isolation goes with it — you start hearing more of the room and the bud starts feeling loose. Klowcok's answer is a cheap, washable, light-weight silicone replacement rather than a new pair of earbuds. The tips are described as easy to replace and designed to fit securely, and the listing notes effective noise blocking, which in practice comes down to getting a good seal in the right size.
Who should skip it: anyone who does not own those specific Soundcore models. The compatibility list is narrow — Soundcore Sleep A20 and A30 — and there is no indication these fit other brands or other Soundcore lines. If you are shopping for a general-purpose earplug, this is the wrong product entirely. And if your earbuds themselves are failing — battery, charging case, audio dropouts — new tips will not fix that; they only address fit, seal and comfort.
Side-by-Side: Which Should You Choose?
• Best for sleep without any electronics → Beinkap 2. No battery, no pairing, no charging case to lose.
• Best for existing Soundcore Sleep A20 / A30 owners → Klowcok Replacement Ear Tips. It is the maintenance part, not a new device.
• Best for side sleepers → Beinkap 2. The soft silicone and ergonomic shape are specifically described as comfortable for sleeping on your side.
• Best for fit experimentation → Klowcok. Two pairs in each of three sizes lets you test both ears independently without committing.
• Best for loud social settings, concerts and parenting → Beinkap 2. The 28 dB reduction is aimed at keeping speech and music intelligible while lowering the overall level.
• Best for replacing worn, stretched or lost tips → Klowcok. Washable silicone tips are the wear item on any earbud.
• Best for a single complete purchase → Beinkap 2. Two pairs of plugs, six tip sets, a case and guidance tips in one box, plus a 12-month warranty.
• Best for keeping an existing setup alive → Klowcok. If your earbuds still work well and only the tips are tired, this is the targeted fix.
In my opinion, most people searching this comparison should buy Beinkap 2. It is the product that works on its own, covers more situations — sleep, study, work, concerts, parenting — and arrives as a complete kit with multiple sizes and a storage case. I would only steer you to Klowcok Replacement Ear Tips if you already own Soundcore Sleep A20 or A30 earbuds and your problem is specifically a worn, uncomfortable or missing tip. In that case, Klowcok is the smarter, more targeted buy. As always, check the current price on Amazon before deciding, since that is the one variable that can flip this call.
No. Beinkap 2 is a standalone noise-reducing earplug set with up to 28 dB reduction, two pairs of plugs and six sets of silicone tips in S/M/L. Klowcok is a pack of 12 replacement silicone tips made for Soundcore Sleep A20 / A30 earbuds, and the earbuds are not included.
Based on the listed compatibility, no. Klowcok specifies Soundcore Sleep A20 / A30 only. There is no indication they fit other Soundcore models or other brands, so if you own different earbuds, look for tips listed for your specific model.
Beinkap 2. Its soft-touch silicone and ergonomic shape are described specifically with side sleeping in mind, so there is no hard shell pressing into your ear. Klowcok tips are designed to restore the feel of Sleep A20 / A30 earbuds, which are themselves built for sleep — but they only help if you own those earbuds.
No. Beinkap 2 is a passive earplug with no electronics, no Bluetooth and no microphone. It lowers noise by up to 28 dB while keeping speech and sound recognizable. If you want audio plus noise masking, you need earbuds — and if those earbuds are Soundcore Sleep A20 or A30, Klowcok is the tip replacement for them.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.