ideally suited for fine adjustment of the hat

This cork strips fit just fine in the inner lining of my hat ring. This allows the fit of the hat to adjust exactly. You can see the cork strips at the front and / or rear inserting into the hat. Also helpful when the hat in use over time should something wide.

PLUS:
+ Pre-bent with a slight radius
+ Easy to use
+ Is well fixed in the feeding ring
+ Breathable with porous cork structure

MINUS:
- Nothing

I bought at a fair price 10 pieces of cork strips. That probably goes up to my end of life. I'm very satisfied.