SureFire EarPro EP2 CommEar Boost EP2-RS Comfort Radio Communications Earpiece Right/Small Discretely and covertly monitor radio communications Open design does not block ear canal, permits hearing ambient sounds and conversation Made from soft, hypo-allergenic, medical-grade polymer Sound stem extends slightly farther into ear canal compared to other open earpieces, producing a "boost" effect by delivering sound more efficiently. Enables clear hearing with lower radio volume setting reducing possibility of gradual hearing loss