The OX-ON D1 Comfort hearing protector is produced in a dielectric plastic design, making it robust as well as protecting you in electrical environments. This hearing protector features a unique dual headband, providing excellent comfort and reducing pressure on the head. The headband can be adjusted quickly and easily. The internally ventilated headband insures that you remain perfectly comfortable in hot and humid environments. The horizontal adjustment remains fixed while you are using the hearing protector, and with the addition of snap-in ear muffs, it can be positioned as necessary quickly and easily. The cups are made from impact-resistant ABS material, and the unique double layer of foam ensures a high level of sound muffling. Soft sealing rings provide perfect covering for the ears. This lightweight hearing protector has an SNR (signal-to-noise ratio) of 33 dB. High frequency: 34 dB Medium frequency: 31 dB Low frequency: 23 dB Extremely lightweight at just 238 g.