| CSA Class A |
| Ear cup pivot points tilt for optimum comfort and efficiency |
| It features an electrically insulated wire headband often referred to as "dielectric" |
| Noise Reduction Rating (NRR)b 22 dB |
| SNR 27dB, High Frequency = 32dB, Medium Frequency = 24dB, Low Frequency 16dB |
| The metal components of the headband have been covered by non-conductive material for use in a low voltage electrical hazard (less than 440 V ac) |
| The wire headband offers consistent pressure over prolonged wearing periods |
| The X1A Earmuff is lightweight, low-profile designed for protection against low-level industrial noise and other loud sounds |
| The X1A is a lightweight low- profile earmuff designed for protection against low-level industrial noise and other loud sounds |
| The X-Series (over-the-head) headband version is electrically insulated - sometimes referred to as "dielectric" |
| The X-Series earmuffs are 3M's latest advancement in hearing conservation |