2 Stars
In summary, it's a great concept, but the execution fell short.
The adhesive-backed pad tends to lose stickiness over time, especially when putting the hat on & off. When I remove a liner, the residue sticks to my head, & replacing it with a new liner was the only solution.
Additionally, if the liner is pushed too far before replacing it, it starts to disintegrate, leaving a mess on my head when I take off the hat.
To get the advertised discount, I had to commit to three monthly shipments, which left me with a surplus of these liners. If there was a disclaimer on this commitment, I surely don’t recall seeing it, and if it was there, it might have been in the small print because I’m usually pretty good about spotting that kind of stuff. I never would have knowingly committed to a three-month supply of a product I’ve never tested. I’m stuck with a surplus of liners I’ll never use.