Hidden treasures

Next week I am going on a one to one millinery workshop for a few days! I suddenly discovered some treasures I had forgotten I had purchased when I was in Switzerland. I mistyped the German for ‘hat materials’ and found a seller had done the same. 
I ended up with a huge box of ‘blanks’ some of which are absolutely extraordinarily fine quality. I’ll take them to show J. next week, so she can tell me what they are!