Quick Answer: The best all-round keyboard o-rings are Glorious’s O-Ring Switch Dampeners ($8-12 for 120 pieces) — sold in 40A and 70A durometer, each in thin (1.5mm) or thick (2.5mm), so you pick your exact noise-vs-feel tradeoff. If you want the tradeoff spelled out in plain numbers, Captain O-Ring ($10-15 for 135 pieces) labels its packs by exact travel reduction (0.2mm or 0.4mm) instead of a durometer number. Either way, o-rings work by cushioning the bottom-out impact — the loudest part of a keystroke — so a heavy-clack board benefits far more than an already-quiet one.
O-rings are the cheapest, least permanent mod you can make to a mechanical keyboard, and one of the most misunderstood. Buy the wrong thickness or hardness and you’ll either barely notice a difference or feel like your travel got chopped in half. Here’s what each option actually changes, and the packs worth buying.
How o-rings actually change your keyboard
- They only cushion the bottom-out, not the whole keystroke. An o-ring sits on the switch stem under the keycap and compresses when the key bottoms out against the switch housing — that impact is the dominant noise source on most keyboards. It does nothing to a clicky switch’s click leaf or to the upstroke, so pairing o-rings with clicky switches (like Cherry MX Blue) still leaves the click itself audible.
- Durometer and thickness are two separate dials. Durometer (40A vs 70A, per Glorious’s product line) controls how soft the rubber is — softer dampens more but compresses further. Thickness (1.5mm thin vs 2.5mm thick) controls how much travel you lose before the keycap even reaches the o-ring. Captain O-Ring sells the same idea labeled directly as 0.2mm or 0.4mm of travel reduction, so you can pick a level without knowing durometer terminology at all.
- It’s fully reversible. O-rings slide onto a switch stem with no soldering or desoldering, so you can pull them back off at any point and the keyboard returns to stock feel — a lower-risk way to test whether you actually want a quieter board before spending on foam-dampened cases or switch lubing.
Best keyboard o-rings at a glance
| O-Rings | Best for | Pack size | Options | Price |
|---|---|---|---|---|
| Glorious O-Ring Switch Dampeners | Best overall | 120 pcs | 40A/70A, thin/thick | ~$8-12 |
| Captain O-Ring | Best labeled by travel reduction | 135 pcs + cloth | 0.2mm or 0.4mm reduction | ~$10-15 |
| Sumind O-Rings | Best budget bulk pack | 200 pcs | Single 1.5mm clear | ~$6-9 |
| ThreeBulls O-Rings | Best cheap starter pack | 120 pcs | Single clear | ~$6-8 |
| QZONELIFE O-Rings | Best kit with tool included | 200 pcs | 0.2mm reduction + puller | ~$6-9 |
1. Glorious O-Ring Switch Dampeners — Best Overall
Glorious O-Ring Switch Dampeners
- Sold as four distinct SKUs — 40A-Thin, 40A-Thick, 70A-Thin and 70A-Thick — so you choose durometer and travel loss independently instead of getting one generic rubber ring.
- 120 pieces per pack covers a full-size 104-key board with spares left over for a TKL or 60% board later.
- LED-compatible clear housing on some variants, so RGB backlighting isn't blocked by the added rubber.
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Glorious splits durometer and thickness into separate purchases instead of bundling a single “one size fits all” ring, which is the main reason it’s the default recommendation in enthusiast communities. Start with 40A-Thin if you just want to take the edge off bottom-out noise without losing travel; move to 70A-Thick only if you want a firmer, more travel-reducing change. For the boards these pair with best, see our best mechanical keyboard pillar.
2. Captain O-Ring — Best Labeled by Exact Travel Reduction
Captain O-Ring
- Color-coded by exact travel reduction (Red = 0.2mm, Blue = 0.4mm) rather than a durometer number, so you know precisely how much key travel you're giving up before you buy.
- 135 pieces per pack — enough for a full-size board plus spares — and includes a microfiber screen cloth as a bundled extra.
- Marketed specifically around reducing finger fatigue on top of noise reduction, since shorter effective travel means less distance for a fast typist's fingers to cover per keystroke.
If durometer numbers like 40A and 70A don’t mean anything to you, Captain O-Ring’s plain-millimeter labeling removes the guesswork — 0.2mm is the milder change, 0.4mm the more aggressive one. It’s a close second to Glorious on build quality but easier to shop for the first time. Works well on the tall-case boards in our best hall effect keyboard guide, where a firmer bottom-out is common.
3. Sumind O-Rings — Best Budget Bulk Pack
Sumind 200-Piece O-Rings
- 200 pieces covers two full-size boards or a full-size plus a couple of spare/backup sets, at a lower per-ring cost than Glorious or Captain O-Ring.
- 8mm outer diameter, 1.5mm thickness — a single middle-of-the-road spec rather than a menu of durometer/thickness combinations.
- Ships in a small plastic storage box, useful for keeping leftover rings organized instead of loose in a drawer.
Sumind’s pack skips the hardness/thickness options entirely and just gives you a solid, middle-ground 1.5mm ring at bulk-pack pricing — the right call if you’re outfitting more than one keyboard or don’t want to research durometer before your first mod. For boards you’d pair this with, see our best budget mechanical keyboard guide.
4. ThreeBulls O-Rings — Best Cheap Starter Pack
ThreeBulls 120-Piece O-Rings
- 120 pieces at the lowest price point in this roundup — enough for one full-size board with a handful of spares.
- Single-spec clear silicone ring, same "no options to research" simplicity as Sumind's pack but in a smaller quantity for less money upfront.
- A low-risk way to try o-rings for the first time before committing to a multi-durometer set like Glorious's.
If you’re not sure you’ll like the o-ring feel at all, ThreeBulls is the cheapest way to find out — a single 120-pack at the bottom of this roundup’s price range, with no durometer decision to make. If it turns out you want a firmer or softer feel afterward, Glorious’s labeled variants are the natural upgrade.
5. QZONELIFE O-Rings — Best Kit With Tool Included
QZONELIFE 200-Piece O-Ring Kit
- 200 pieces plus a bundled keycap remover tool, so first-time buyers don't need to separately order a puller to get started.
- Labeled 0.2mm reduction, matching Captain O-Ring's milder tier at a lower price point.
- Compatible with Cherry MX-style stems, which covers the vast majority of hot-swap and soldered mechanical keyboards on the market.
The bundled keycap puller is the differentiator here — if you don’t already own one, QZONELIFE’s kit is one purchase instead of two, and the 0.2mm reduction level is a safe, mild starting point. For a step-by-step feel of what installing switch mods looks like, see our how to lube keyboard switches guide — the keycap-pulling process is identical.
How to choose keyboard o-rings
- Start thin and soft if you’re unsure. A 1.5mm/40A ring (or a 0.2mm-labeled pack like Captain O-Ring’s or QZONELIFE’s) takes the edge off noise with the smallest feel change — you can always size up.
- Go thick/firm only if you want a bigger change. 2.5mm/70A rings (or 0.4mm-labeled packs) mute more sound but noticeably shorten travel, which competitive typists and gamers relying on full key travel may not want.
- Buy a bundled tool if you don’t own a keycap puller. QZONELIFE and Sumind both ship one; Glorious and ThreeBulls typically don’t.
- Pair the mod with expectations, not magic. O-rings quiet the bottom-out thump, not a clicky switch’s click or a loud stabilizer rattle — those need separate fixes like switch lubing or stabilizer tuning.
The bottom line
Glorious’s O-Ring Switch Dampeners ($8-12) are the best overall pick because they let you choose durometer and thickness independently instead of guessing at a single generic spec. If plain-language labeling matters more to you than durometer numbers, Captain O-Ring ($10-15) spells out the exact travel reduction on the packaging. Outfitting more than one board on a budget, Sumind ($6-9 for 200 pieces) or ThreeBulls ($6-8 for 120) get the job done without the extra options. And if you don’t already own a keycap puller, QZONELIFE’s bundled kit (~$6-9) saves you a second purchase. For the boards worth modding this way, see our best mechanical keyboard pillar, or if you’re chasing a genuinely silent build rather than just a quieter one, our best quiet mechanical keyboard guide covers boards built for that from the factory.