I do not have a beard but I do have these on my bike. I can tell a difference in the wind coming up across my chest when they are on. Another nice thing about them is they simply snap into place, so they can be removed easily to get all the bugs and debris off when cleaning the bike. And the plastic is pliable enough not to snap at the slightest bend; in other words not like the plastic trim around the ignition switch.
2016 Road Glide Ultra