I have an Akubra Sydney and never paid much attention until recently to the fact that the top part of the liner is plastic. From what I can tell most hats come that way. Is there a good reason for me to keep the plastic in place? And what is the reason hat companies use plastic? All I know is that when it warms up here, that plastic will definitely make the hat less comfortable. I'm considering carefully cutting out the plastic part of the liner.