Earplugs are great for protecting your hearing and cutting down on fatigue, so they are ESPECIALLY nice for road trips. It's amazing how loud the inside of a helmet can be, and subjecting your unprotected ears to that for hours on end can lead to fatigue and hearing damage quickly if you are not wearing ear plugs. If you're using a bluetooth headset, they help to diminish some of the tinny sound of the cheapish speakers. Howard Leight makes some great ones that are very popular with riders. Remember, hearing loss is cumulative and permanent; once you damage your hearing there’s no going back. As long as you can still hear, damage can happen. Protect what you still have!