I Only Carry One Brand of Hearing Protection, and that is "Pro Ears". This is a Premium Brand and All I Items I Carry are of Extreme Quality and Performance. Their Electronic Ear Muffs are of 22, 25, 26, 28 & 30 NRR, Depending on Model. With these NRR #'s, One Can Wear them on Indoor Ranges w/out Additional Ear Plugs (at one's own discretion). Most Other Brands have NRR of 19-23 for their Electronic Models. So, Pro Ears Achieving These Numbers and same with Low-Profile Passive Models, is Extreme Performance and Worthy to be Sold to My Customers !