Description
Good hearing protection only works if you will actually wear it, and the Allen ULTRX Shield hits that sweet spot between real protection and a low-profile build that stays out of your way. This is a passive over-the-head muff carrying an NRR of 23 dB, tested and certified to the ANSI S3.19 standard, so it holds its own against gunfire, power tools, and mowers alike. The high-visibility yellow finish is easy to spot in a range bag or on the workbench, and it pairs nicely with hunter safety gear.
What Sets the ULTRX Shield Slim Apart
The standout here is the razor-slim, contoured ear cup design. Bulky muffs are notorious for bumping into shotgun and rifle stocks when you shoulder up, and the slim profile helps keep your cheek weld consistent without the muff getting shoved off your ear. The rubberized exterior takes knocks, drops, and general range abuse without complaint, which is more than you can say for a lot of cheaper foam-and-plastic muffs.
Comfort and Fit on the Shield Earmuff
All-day wear comes down to the padding, and the Shield uses an extra-padded, adjustable headband along with soft, cushioned ear cups. That combination gives you a snug seal without the vise-grip pressure that leaves your head aching after a long session. The headband slides to fit a range of adult head sizes, and the cups swivel to settle evenly against your ears.
Packing Up the ULTRX Shield
When you are done, the muff folds down into a compact shape that tucks easily into a range bag, toolbox, or truck console. At roughly half a pound it will not weigh down your kit, and the folding hinges keep it from taking up more space than it needs to. It is a straightforward, dependable muff that does exactly what you need without a bunch of fuss.
Key Specifications
- Manufacturer: Allen Company
- Model Number: 4107
- Manufacturer Part Number: 4107
- UPC: 026509076728
- Noise Reduction Rating (NRR): 23 dB
- Certification: ANSI S3.19 tested and certified
- Type: Passive earmuff
- Style: Over the Head
- Color: Interstate Yellow
- Fit: Adult, adjustable headband
- Design: Ultra-slim contoured ear cups, foldable
- Exterior Material: Rubberized
- Approx. Weight: 0.5 lb
- Approx. Length: 7 in
What’s Included
- ULTRX Shield Passive Earmuff (Slim, Interstate Yellow)
Frequently Asked Questions
Is the ULTRX Shield passive earmuff enough for shooting?
For most range work it does the job, carrying an NRR of 23 dB and ANSI S3.19 certification. That level of attenuation covers rifle, pistol, and shotgun sessions well. If you are shooting indoors or running a large-caliber or braked rifle, doubling up with foam plugs underneath is a smart move for extra margin.
Will the slim design keep the muffs from bumping my rifle stock?
That is exactly what the razor-slim, contoured ear cups are built for. The low profile helps you get a consistent cheek weld without the cup getting knocked loose when you shoulder a long gun. It is one of the main reasons folks pick a slim muff over a bulkier passive design.
Does the ULTRX Shield fold up for storage?
Yes, it folds down into a compact shape that tucks easily into a range bag, toolbox, or truck console. At around half a pound it stays light in your kit. The rubberized exterior also holds up to being tossed in with the rest of your gear.
Is this earmuff good for more than just shooting?
Definitely. The 23 dB rating makes it a solid pick for mowing, running power tools, woodworking, and general shop or construction noise. The durable rubberized build is meant for daily use, not just occasional trips to the range.





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