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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-19 · 7 min read · Independent comparison
• Krone Kalpasmos biggest strength: Purpose-built for the Sony WH-CH720N, with protein leather over high-density memory foam, a described noise-seal upgrade, tool-free snap-in installation, and a 3-year manufacturer warranty.
• Krone Kalpasmos biggest trade-off: It fits one headphone family only — the Sony WH-CH720N — so it is useless if you own anything else, and being handmade it can vary by a few millimeters.
• DowiTech biggest strength: A comfortable protein leather and memory foam cushion set for the JLab Go Work on-ear headset, backed by a 1-year warranty and a stated 24-hour response promise for defects or compatibility problems.
• DowiTech biggest trade-off: It is locked to the JLab Go Work, ships without the detailed written instructions Krone mentions, and its coverage window is shorter.
• Pick Krone Kalpasmos Replacement Ear Pads if you own Sony WH-CH720N headphones and want the closest thing to an original-equipment refresh.
• Pick DowiTech EarPads Replacement Compatible if you own a JLab Go Work on-ear headset and value support response and warranty handling over brand-specific engineering language.
This is a single-target product, and that is its whole point. Krone Kalpasmos built these pads specifically for the Sony WH-CH720N — the listing name calls out WH-CH720N, CH720N and WHCH720/WHCH720N variants, and the compatibility field lists Sony WH-CH720N as the device. If that is your headphone, the fit question mostly disappears, because the pad geometry was designed around that one chassis rather than adapted from a generic cushion.
The materials story is the second half of the pitch. You get protein (faux) leather on the outside and high-density memory foam inside, described as sweat-resistant and breathable. Krone claims the foam density matches the original and that the seal helps preserve clarity, bass and the noise-cancelling behavior of the Sony set — which matters, because a loose or squashed aftermarket pad is exactly what kills ANC performance on a worn-out pair. Installation is tool-free: align and press, no prying, no adhesive wrestling. The brand also says detailed instructions come in the package, and it recommends swapping pads roughly every seven to eight months for hygiene, with pads usable for 180 days or more.
The trade-offs are honest ones. It is a Sony-only part. The brand states the pads are handmade, so measurements can differ by a few millimeters from what is shown — normal for this category, and it says fit is unaffected. And you must supply your own headphones; none are included.
Skip it if: your headphones are not Sony WH-CH720N, or you want one pad set that could cover multiple headsets in the house.
DowiTech EarPads Replacement Compatible: Who It's For
DowiTech plays the same game for a different headphone. These cushions are made for the JLab Go Work Wireless On-Ear Headphone, and that is the only model listed in the compatibility data. If you are running a Go Work set for calls, classes or desk work and the original pads have gone shiny and flat, this is the direct replacement path.
The build description is straightforward: protein leather chosen for a smooth, leather-like surface with good abrasion resistance, paired with memory foam that DowiTech says holds its shape through repeated use and reduces fatigue in long sessions. The company also claims the pads conform to the ear and help block noise while enhancing sound — the usual cushion-seal benefit, and a reasonable expectation from fresh foam on an on-ear design.
Where DowiTech differentiates is not the foam but the after-sale posture. It advertises a 1-year warranty against manufacturer defects and says any issue gets a response within 24 hours, with free replacement or refund offered for defects or compatibility problems. That is a concrete, checkable promise, and for a low-cost wear item it is arguably the most valuable line on the page.
The honest limitations: it is JLab Go Work only, the warranty is one year rather than three, and unlike Krone there is no mention of printed instructions in the box — DowiTech instead asks you to contact them if installation gives you trouble. If you would rather not have to email anyone to figure out a fit, that is a real consideration.
Buy it if: you own a JLab Go Work on-ear headset, want fresh protein leather and memory foam cushions, and like knowing there is a warranty and a fast support channel behind the purchase.
Skip it if: your headset is not a JLab Go Work, or you want the longer coverage window and the instruction sheet that the other option advertises.
• Best for Sony WH-CH720N owners → Krone Kalpasmos Replacement Ear Pads. It is the only one of the two designed for that chassis.
• Best for JLab Go Work owners → DowiTech EarPads Replacement Compatible. Same logic in reverse; the two products do not overlap in compatibility at all.
• Best for long-term protection → Krone Kalpasmos Replacement Ear Pads. A 3-year manufacturer warranty versus DowiTech's 1-year defect warranty.
• Best for hands-off installation → Krone Kalpasmos Replacement Ear Pads. Tool-free snap-in plus detailed instructions in the package.
• Best for support response → DowiTech EarPads Replacement Compatible. A stated 24-hour reply window with free replacement or refund for defects and compatibility issues.
• Best for preserving active noise cancelling → Krone Kalpasmos Replacement Ear Pads. Its seal and foam density are explicitly tied to maintaining the Sony set's noise-cancelling performance.
• Best for comfort on a budget on-ear headset → DowiTech EarPads Replacement Compatible. Protein leather and memory foam aimed at reducing fatigue in long sessions.
• Best if you want zero guesswork about fit → match the pad to your headphone. Neither product crosses over, so the decision is made by what is on your desk, not by the spec sheet.
In my opinion, the deciding factor here is not the foam — both use protein leather over memory foam, and both are described as comfortable and noise-blocking. It is the headphone you already own. If that is a Sony WH-CH720N, I would buy the Krone Kalpasmos Replacement Ear Pads for the model-specific fit, the instruction sheet, the stated ANC-preserving seal and the longer 3-year warranty. If you are on a JLab Go Work, the Krone set is simply not an option, and I would take the DowiTech EarPads Replacement Compatible for its 1-year warranty and 24-hour support promise. Buy the one that matches your headset and check the current price on Amazon before you commit.
FAQ
On paper, Krone Kalpasmos carries a 3-year manufacturer warranty and says its pads can be used 180 days or more, with a recommendation to replace them every 7–8 months for hygiene. DowiTech offers a 1-year warranty against manufacturer defects. Longer stated coverage favors Krone.
Both brands claim their foam and leather seal improves noise blocking and sound. Krone Kalpasmos is more specific, saying the high-density foam maintains the Sony headphone's noise-cancelling function and matches original quality. Fresh, well-sealed foam is generally what restores that performance after the originals wear out.
Krone Kalpasmos says installation is tool-free — align and snap — and includes detailed instructions in the package. DowiTech says its pads are manufactured to the original design for a precise fit and asks you to contact them if you hit an installation issue, with free replacement or refund for defects or compatibility problems and a stated 24-hour response.
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