XP Reactor Earplugs offers you one of the most innovative sound filtering solutions yet. Youll hear sound clearly and naturally, then when loud sounds hit your ears, the Dynamic Mesh Filtering System will automatically compress those sounds to protect your hearing. Youll get 33 dB SNR against loud impulse sounds while still maintaining normal hearing. Youll also have 5 dB SNR hearing protection against general sounds.Medical grade, non-allergenic, ultra-soft eva material and design gives you the perfect fit Abs, medical grade, non-allergenic material is used for sound filters 1 pair medium & 1 pair large tips come standard with every order. small & extra large tips available upon ordering or afterwards. 5 db single number rating (snr) against normal sounds 33 db snr against damaging loud sounds Hear normal sounds Additional filters available for specific applications Neoprene carry case Easy start instruction manual Lanyard (optional) Extra tips available (optional)