What's the difference between this er20xs model and etymotic's cheaper "high fidelity" option?

The noise attenuation is the same. Both are "high fidelity" earplugs in that they lower the decibels to a safe level while preserving clarity.Differences--ER20XS can change out the eartips. ER20XS has an option for foam eartips. ER20XS stem is shorter and more discreet. It fits more comfortably underneath hats, helmets and other headgear. Etymotic Research

I see most reviews used these for concerts/music... How do/would you think they would perform with something such as shooting firearms?

I would not recommend them for shooting a firearm. These earplugs are great at filtering the sound and reducing overall noise by about 20-30 decibels. This is not nearly enough for the bang of a firearm.

Will these stay inserted in the ear if the person is performing/fast moving or will the combination of sweat and movement cause them to fall out?

Let's start with comfort. They are not as comfortable as poly plugs- but, you will get used to them. Watch GP riders before a race. All use urethane plugs.But, I do like them and continue to use them- usually. They stay in a bit better and reduce the noise at lease as well. You own a BMW, you can afford to try them. You might prefer them. Buy a pair.

What's the difference between universal fit and standard/large?

universal fit gives you 3 different replaceable fittings and is the safest choice if you want a more exact fit. Standard is what fits most people. Large that simply for those that have large ear openings.

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ETYMOTIC RESEARCH (エティモティックリサーチ) 高級イヤープラグ ER20XS-SMF-P 【国内正規品】 1ペア (x 1) 透明

ETYMOTIC RESEARCH (エティモティックリサーチ) 高級イヤープラグ ER20XS-SMF-P 【国内正規品】 1ペア (x 1) 透明

Product ID: 727958441

Details

サイズ
1ペア (x 1)
スタイル
コードなし
ブランド
Etymotic
再利用可能性
再利用可能
色

👂Low-profile, flat fit design

🔇20 dB noise reduction

🔍Translucent, discreet look

$66.67

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔕 Hear the world, not the noise—silence never looked this sleek!

READY TO GO - Includes neck cord and case for easy storage and on-the-go use—never lose your peace of mind.
INVISIBLE COMFORT - Translucent design blends seamlessly with your ear for discreet, confident wear anywhere.
SLEEK STEMLESS FIT - No protruding parts—wear comfortably under hats, helmets, or on stage without distraction.
BUILT FOR PROFESSIONALS - Trusted by musicians and industrial workers alike for reliable hearing protection in loud environments.
PRECISION NOISE CONTROL - Blocks 20 dB of harmful noise while preserving sound clarity—hear everything, just quieter.

The ETYMOTIC RESEARCH ER20XS-SMF-P Premium Ear Plugs deliver professional-grade 20 dB noise reduction with a translucent, low-profile design that stays discreet and comfortable. Ideal for musicians, construction workers, and anyone exposed to loud environments, these reusable earplugs fit flat against the ear, allowing use under hats and helmets. Included accessories like a neck cord and case make them perfect for daily protection without sacrificing sound clarity.

Specifications

ASIN	B00RM6Q9XW
ASIN	B00RM6Q9XW
Amazon 売れ筋ランキング	ドラッグストア - 72,084位 ( ドラッグストアの売れ筋ランキングを見る ) 耳栓 - 407位
GTIN (Global Trade Identification Number)	00084643001747, 00846430001749
UPC	846430001749 084643001747
おすすめ度	4.2 5つ星のうち4.2 (4,382) var
カスタマーレビュー	4.2 5つ星のうち4.2 (4,382) var dpAcrHasRegisteredArcLinkClickAction; P.when('A', 'ready').execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( 'acrLink-click-metrics', 'click', { "allowLinkDefault": true }, function (event) { if (window.ue) { ue.count("acrLinkClickCount", (ue.count("acrLinkClickCount") \|\| 0) + 1); } } ); …
カラー	クリアー、フロストイヤーチップ（半透明）
サイズ	1ペア (x 1)
スタイル名	コードなし
セット数	2
ブランド名	Etymotic Research
メーカー	ETYMOTIC
メーカーにより製造中止になりました	いいえ
メーカー名	ETYMOTIC
メーカー型番	ER20XS-SMF-P
ユニット数	1 個
再使用可能性	再利用可能
商品の入り数	1
商品の重量	0.4 オンス
商品モデル番号	ER20XS-SMF-P
商品本体サイズ	10 x 19 x 10 mm
型番	ER20XS-SMF-P
特殊な用途	聴覚保護
製品サイズ	1.02 x 1.91 x 1.02 cm; 11.34 g

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