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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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

🔇20 dB noise reduction

🧴replaceable silicone tips

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NZ$84

Duties & taxes included

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Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎶 Protect your ears without missing a beat — hear every moment, safely.

ON THE GO READY - Includes sleek neck cord and pocket-sized carrying case for stylish convenience anywhere.
SMART REUSABILITY - Durable silicone eartips are interchangeable and replaceable, maximizing value and hygiene.
ALL DAY COMFORT FIT - Low-profile, snug design fits discreetly under helmets, hats, and headgear for extended wear.
CRYSTAL CLEAR QUIET - Experience 20 dB even sound reduction that lowers volume without muffling speech or music.
NEXT GEN COMPACT DESIGN - ER20XS reengineered for extra small, ultra-light fit that stays comfortably in place.

Etymotic Research ER20XS High-Fidelity Earplugs deliver professional-grade 20 dB noise attenuation with crystal-clear sound quality. Designed for comfort and discreet wear under helmets or hats, these reusable earplugs feature replaceable silicone tips and come with a neck cord and compact carrying case. Perfect for concerts, travel, motorcycling, and any loud environment where preserving hearing without sacrificing audio clarity is essential.

Specifications

ASIN	B00RM6Q9XW
Best Sellers Rank	#10,573 in Health ( See Top 100 in Health ) #41 in Earplugs
Brand Name	Etymotic Research
Color	Clear/Frost
Customer Reviews	4.2 4.2 out of 5 stars (4,364)
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
Noise Attenuation	20
Noise Reduction Rating (NRR)	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 (SNR)	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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