Earmold Medium Right Molded Earpieces Are A Must For Law Enforcement Personnel That Need To Hear The Ambient Sounds Around Them. They Are "vented" To Allow The Ambient Sound To Penetrate The Ear While Providing A Clear Audio Signal From The Radio. The Molded Earpieces Mimic The Shape Of Our Ears And Lock Into Place, Which Lessens The Chances Of Falling Out During A Foot Pursuit Or Other Physical Activity. Available In Small, Medium And Larger, Either Left Or Right.