I have been using these inserts for many years in my extensive collection of ball caps. They work great holding the shape and I cannot tell that there is anything in my cap. They are very durable as I have yet to wear one out. I get more, not as a replacement, but because I get new hats. I have worn these in the hats I run and walk in, and they have not broken down yet. I highly recommend these inserts.
Rating:
[5 of 5 Stars!]