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 High-Fidelity Earplugs, ER20XS Standard Fit, Polybag Package, 1 pair

Product ID: 256211081

Details

Brand
Etymotic
Colour
Clear/Frost
Material
Plastic
Recommended uses for product
Noise
Size
1 pair (Pack

🎧high-fidelity sound clarity

🔇20dB noise reduction

🧴replaceable silicone tips

254.65 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔊 Protect your ears, not your vibe — hear every moment in high fidelity!

ON THE GO READY - Includes a sleek carrying case and neck cord for effortless portability and quick access.
ALL DAY COMFORT FIT - Low-profile, snug design fits discreetly under hats and helmets for extended wear.
BUILT TO LAST ADAPT - Interchangeable silicone eartips ensure a perfect fit and long-term value.
NEXT GEN COMPACT DESIGN - ER20XS reengineered for an extra small, ultra-compact fit without compromising performance.
CRYSTAL CLEAR PROTECTION - Experience balanced 20dB noise reduction that preserves sound quality without muffling.

Etymotic Research ER20XS earplugs deliver professional-grade 20dB noise attenuation with true high-fidelity sound, preserving speech and environmental clarity. Designed for comfort and discreet wear, they come with replaceable silicone tips, a neck cord, and a compact carrying case—perfect for concerts, travel, and daily noise protection.

Specifications

ASIN	B00RM6Q9XW
Best Sellers Rank	#17,640 in Health ( See Top 100 in Health ) #57 in Earplugs
Brand Name	Etymotic Research
Color	Clear/Frost
Customer Reviews	4.2 4.2 out of 5 stars (4,689)
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 Type	Plastic Silicone
Model Name	ER•20XS-SMF-P
Model Number	ER20XS-SMF-P
Net Content Count	1 Count
Noise Attenuation	20
Noise Reduction Rating	20 Decibels
Number of Items	1
Number of Pieces	2
Package Size Name	1pc
Product Style	Standard Fit
Recommended Uses For Product	Noise Protection
Reusability	Reusable
Single Number Rating	20 Decibels
Size	1 pair (Pack of 1)
Specific Uses For Product	Noise Protection
Sport Type	Shooting
UPC	846430001749 084643001747
Unit Count	1 Count

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