HexArmor K-Series Ceros K2C Helmet-Mounted Earmuffs
The HexArmor K-Series Ceros K2C Earmuffs are slot-mounted hearing protectors designed to attach directly to compatible Ceros safety helmets. They provide an NRR of 25 dB and CSA Class A hearing protection for demanding industrial, construction, utility, and work-at-height environments.
The K2C features lightweight construction and memory-foam cushioned earpieces designed for a comfortable, low-pressure fit during extended wear. The ergonomic mounting system helps reduce strain and improve balance when the earmuffs are installed on the helmet.
The earmuffs rotate 360 degrees, allowing them to move between the operating position, standby position, and a low-profile resting position against the helmet when hearing protection is not required. Hi-vis accents provide additional visibility.
The K2C is designed for direct slot mounting without a face shield. Customers who need to use helmet-mounted hearing protection together with a face shield should use the appropriate K2M configuration rather than the K2C.
Manufacturer Part Number: 17-16001
UPC: 810001791704
Noise Reduction Rating: 25 dB
Mounting: Direct helmet slot attachment
Color: Black with hi-vis accents
Rotation: 360 degrees
Ear Cushions: Memory foam
Available for purchase individually as one pair of earmuffs or by the full case. A manufacturer case contains 20 pairs.
Compatibility with Vertex HexArmor Helmets
| Vertex Helmet | K2C Compatibility |
|---|---|
| Ceros XP450A Vented Type 1 Class C with Mips | Yes |
| Ceros XP450AE Non-Vented Type 1 Class E with Mips | Yes |
| Ceros XT400 Vented Full-Brim Type 2 Class C with Mips | No |
| Ceros XT400E Non-Vented Full-Brim Type 2 Class E with Mips | No |
This distinction matters. HexArmor specifically lists the K2C as compatible with the XP250, XP250E, XP450A, and XP450AE. HexArmor does not list the XT400 or XT400E as compatible with the K2C.
Performance Ratings
| Protection / Standard | Rating |
|---|---|
| Noise Reduction Rating | NRR 25 dB |
| CSA | Class A |
| REACH | Pass |
| Mounting | Slot-Adapted |
| Rotation | 360° |
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Packaging



