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 ER20XS-SMF-P High-Fidelity Earplugs, 1 Pair, Standard Fit, Polybag Package Size: Standard Fit Model: ER20XS-SMF-P

Etymotic Research ER20XS-SMF-P High-Fidelity Earplugs, 1 Pair, Standard Fit, Polybag Package Size: Standard Fit Model: ER20XS-SMF-P

Product ID: 141613463

Details

Brand
Etymotic
Colour
Clear/Frost
Material
Plastic
Recommended Uses For Product
Noise
Size
1 pair (Pack

🎧High-fidelity sound clarity

🔇20 dB noise reduction

♻️Reusable & eco-friendly

64854CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔇 Elevate your focus, protect your vibe.

BUILT TO LAST - Durable plastic silicone construction ensures long-term use, making these earplugs a smart investment in your hearing health.
READY FOR ACTION - Includes neck cord and carrying case for on-the-go convenience and quick access whenever you need peace.
TRUSTED BY THOUSANDS - With over 4,300 positive reviews and a solid 4.1-star rating, join the community prioritizing smart noise protection.
COMPACT DISCREET DESIGN - Standard fit with a sleek clear/frost finish that blends seamlessly for all-day comfort and style.
CRYSTAL CLEAR SOUND NOT SILENCE - Experience premium noise reduction without muffling your environment—perfect for meetings, concerts, or focused work.

The Etymotic Research ER20XS-SMF-P High-Fidelity Earplugs deliver 20 dB noise attenuation with crystal-clear sound fidelity. Designed for professionals and audiophiles alike, these reusable earplugs come with a neck cord and carrying case for convenience. Their discreet, standard fit and durable silicone build make them ideal for work, concerts, sports, and everyday noise protection.

Specifications

ASIN	B00RM6Q9XW
Best Sellers Rank	#173,594 in Health & Personal Care ( See Top 100 in Health & Personal Care ) #444 in Ear Plugs
Brand	Etymotic
Colour	Clear/Frost
Customer Reviews	4.1 4.1 out of 5 stars (4,389)
Global Trade Identification Number	00084643001747, 00846430001749
Included Components	1 pair Standard Fit ER20XS High-Fidelity Earplugs, neck cord, and carrying case
Item Dimensions	10 x 19 x 10 Millimeters
Item Form	Pair
Item Nype Name	Earplugs
Item Weight	0.4 Ounces
Manufacturer	Etymotic Research, Inc
Manufacturer Part Number	ER20XS-SMF-P
Material	Plastic Silicone
Model Name	ER20XS-SMF-P
Model number	ER20XS-SMF-P
Net Content Count	1 Pair
Noise Attenuation	20 dB
Noise Reduction Rating	20 Decibels
Number Of Pieces	2
Number of Items	1
Package Size Name	Pack of 1
Product Style	Standard Fit
Recommended Uses For Product	Noise Protection
Reusability	Reusable
Single Number Rating	20 Decibels
Size	1 pair (Pack of 1)
Sport Type	Shooting
UPC	846430001749 084643001747
Unit Count	1 Count
Usage	Sports and Exercise

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