These comfortable behind-the-head earmuffs feature low-profile earcups that fit well with most helmets, eyewear, and other safety equipment. Provides effective hearing protection against high-frequency noise. Wear these earmuffs in multiple ways-headband, neckband, helmet-attachable, and folding. Stainless steel construction resists bending and warping with extended use. Earcups feature pivot points that tilt and optimum comfort and efficiency. NRR of 21 dB and CSA class B compliance.