A simple burn test of one fiber from the Kilt will tell.

Acrylic will burn "fiercely" will keep burning after your remove the original flame and leave a molten blob behind. It will smell like acid. An Acrylic Kilt will take only about a min. to burn & melt down to a puddle molten plastic.

P/V will burn with a "sputter". will almost self extinguish when you remove the flame and will leave a firm black or gray ash. It will smell like celery.