Military perspective. If you are wearing a helmet and running around all day there is aren't any products that will stay in your ears. On long marches it is

Military perspective. If you are wearing a helmet and running around all day there is aren't any products that will stay in your ears. On long marches it is normal for young soldiers to abandon any concept of headphones in favor of full speakers. They put one, sometimes two, speaker in the top of their pack and simply blast music for everyone around them to hear. The effect is the ultimate retro, harkening back to the days of ghettoblaste/boomboxes.