Soft, conical tips swivel for easier fitting and greater comfort. Silicone tips contain a foam core for an effective seal and good noise reduction. Flexible band can be worn under the chin for use with hard hats. Ideal for intermittent hearing protection needs. Replacement tips available. NRR 20 dB when the band is worn under-the-chin. 17 dB when the band is worn behind-the-head. CSA Class BL.