Hearing Protection, often call “Ears” helps us protect our hearing when we are on the range. When looking at Ear Muffs, look for at least a Noise Reduction Rating (NRR) of 25 or higher. Electronic ears, which automatically shut down for loud noises but let you hear the person you are shooting with are great, but tend to be a little more expensive. Also, you can use foam inserts, under your muffs to double up on protection.
Lastly, there are custom molded hearing protection, that fit into the ear and block all sounds, they may also be available in an electronic version. These do require the assistance of a professional, but I love mine! (They are bright pink and royal blue swirled together. )
Bottom line, decide what you are comfortable with and what your budget can handle. Even if outdoors, and the range allows it, do not shoot with hearing protection. Once you lose your hearing due to exposure to loud noises, even partially, it is likely gone for good. Protect your hearing.