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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-21 · 6 min read · Independent comparison
• WC PadZ QC35 — biggest strength: Purpose-built replacement ear pads for specific Bose over-ear models, with softer leather, memory foam and reinforced glued seams.
• WC PadZ QC35 — biggest trade-off: It only fits the Bose models on its compatibility list — it will not work on any other headphone.
• TrelaCo 20 — biggest strength: Twenty pairs of slow-rebound memory foam tips with a 5mm inner bore that fit a wide range of 4.5–5.0mm nozzle earphones.
• TrelaCo 20 — biggest trade-off: These are in-ear tips, not over-ear cushions — they solve a completely different problem than the Bose pads.
• Who each pick is for: WC PadZ QC35 is for owners of compatible Bose over-ear headphones; TrelaCo 20 is for anyone with in-ear monitors, ISOtunes-style buds, or multiple users who burn through tips.
The WC PadZ QC35 is a single-count replacement ear pad kit made specifically for a handful of Bose over-ear headphones. The compatibility list is explicit: QuietComfort 35 and 35ii, QuietComfort 25, QuietComfort 2, QuietComfort 15, AE2, AE2i, AE2w, SoundTrue and SoundLink. If your model isn't on that list, this product isn't for you — and I appreciate that the manufacturer says so plainly instead of pretending it's universal.
What it does best is restore comfort. The pads use a softer faux leather over memory foam, and the brand claims they feel soft from day one rather than needing a break-in period. That matters if your originals have flattened out and your ears now press against the driver housing during long listening sessions. The pads are also built with added thickness, which is the whole point of a replacement — you want the cushion to sit proud of the frame again, not collapse into it.
Durability is where the design details get interesting. The inner seams are stitched and reinforced with glue, a specific choice aimed at preventing the splitting that kills cheap replacement pads early. There's also a 365-day full warranty backing it. Installation is meant to be tool-free, with a step-by-step guide included in the box. If you've ever pried a Bose pad off its mounting ring, you know a guide is genuinely useful the first time.
Who should buy it: anyone with a compatible Bose over-ear whose stock pads are worn, cracked or uncomfortable, and who wants a thicker, softer cushion without replacing the headphones. Who should skip it: owners of any other brand or model, and anyone expecting a universal fit. In my opinion, this is a repair-and-extend purchase, not an upgrade to a different headphone.
TrelaCo 20 is a 20-pair pack of black memory foam replacement earbud tips. The key spec is the 5mm inner bore, which the brand says fits earphones with 4.5–5.0mm sound tubes — named examples include Etymotic, NuForce, ISOtunes PRO and Q-Jays. That's a real constraint: measure or check your nozzle before buying, because a 5mm bore won't seal on a much wider or narrower tube.
The material is slow-rebound memory foam, meaning it compresses and then gently expands to fill your ear canal. That's the mechanism behind the two things these tips are good at. First, comfort over long stretches — foam distributes pressure instead of pressing at a single point like some silicone tips. Second, passive noise isolation: the dense foam structure physically blocks outside sound and, as a side effect, tends to firm up bass response because you get a better seal.
The upgraded shape is designed to hold firm during running, gym sessions or travel, so they shouldn't work their way loose mid-workout. The brand also lists a wide set of intended users — commuters, musicians, recording studios, live performers, drummers, and people who want noise reduction on public transport.
The 20-pair count is the real story. It's pitched as a clean, hygienic option for families or professional settings, and it makes obvious sense for shooting ranges and shooting clubs where several people share hearing protection, or for anyone who wants a fresh set without ordering again every few weeks. Care instructions are simple: wipe with a soft cloth and lukewarm water, and avoid alcohol-based cleaners or lotions that can degrade the foam.
Side-by-Side: Which Should You Choose?
• Replacing worn pads on Bose QC35/35ii → WC PadZ QC35. It's the only one of the two designed for that job.
• In-ear tips for Etymotic, NuForce, ISOtunes PRO or Q-Jays → TrelaCo 20. The 5mm bore is built for those 4.5–5.0mm nozzles.
• Best for long-session comfort on over-ears → WC PadZ QC35, with its softer leather and memory foam.
• Best for noise isolation → TrelaCo 20. Dense foam sealing the ear canal blocks more outside sound than a pad swap will.
• Best for durability engineering → WC PadZ QC35, thanks to the stitched-and-glued inner seams and a 365-day full warranty.
• Best for bulk and hygiene → TrelaCo 20, since you get 20 pairs for shared or professional use.
• Best for workout and travel stability → TrelaCo 20, shaped to stay put during running and gym use.
• Best for a shared household → TrelaCo 20; best for a single headphone owner doing one repair → WC PadZ QC35.
If I owned a Bose QuietComfort 35 or 35ii with tired cushions, I'd buy the WC PadZ QC35. It's a targeted fix: thicker memory foam, softer leather, reinforced seams and a full year of warranty coverage, and it keeps a headphone you already like in service. I'd only pick the TrelaCo 20 if my problem were in-ear tips instead — and for bulk buyers, shooters or anyone sharing earbuds, that 20-pair pack is the smarter call. Different jobs, so match it to your headphones, not to a brand. Check the current price on Amazon for whichever one your model actually needs.
FAQ
Yes. The compatibility list includes both QuietComfort 35 and 35ii, plus QC25, QC2, QC15, AE2, AE2i, AE2w, SoundTrue and SoundLink. It will not fit Bose models outside that list.
Only if your earphones have a 4.5–5.0mm nozzle — the tips use a 5mm inner bore. They're named as fitting Etymotic, NuForce, ISOtunes PRO and Q-Jays, so check your sound tube size first.
TrelaCo 20. Memory foam tips seal inside your ear canal, which blocks outside noise and strengthens bass. The WC PadZ QC35 improves comfort and seal on over-ears, but it's a cushion replacement, not an isolation upgrade.
WC PadZ QC35 pads are designed to stay thick longer, with glued, reinforced seams and a 365-day full warranty. TrelaCo 20 tips are foam and will wear with use — which is exactly why the pack includes 20 pairs, and why wiping them with lukewarm water instead of alcohol-based cleaners helps them last.
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