At the International show in San Mateo, Ca. I had a pair of custom molded stereo earplugs made by Big Ear. My second set, the first set is made by Challenger. What a total difference in fit and finish. The Big Ear sound is way better, clearer and more detailed. The fit is also way, way better. Locks in place better and gives more db reduction from the outside. They are also smaller and less obtrusive. They also have a flat plastic plate on the outside to fit the ear flatter. The big ear customs were about $60-$100 more depending when and where you bought them but well worth the extra money for the fit and performance. I had to turn the volume down on my devices when riding. Glad I popped for the extra dough, it was well worth it. I will use the Challengers as a spare or for work.