I really like these hearing protectors versus big, bulky and expensive (quality) head sets. These come in a small protective carry case that fits easily into just about any pocket.Initially,I had a problem with one ear but soon discovered that my left ear canal was larger than my right. My version of "custom" was to purchase one large pair and one medium pair and mix them. The cost of two pair is still far less than a "totally custom" pair.
Pros: Small Size - Very Good Functionality
Cons: Inserting Properly Into Ear
This review was written in the old system and had content requirements that are different than reviews written today.