Wandered into the Gaelic College (Cape Breton Island) last summer and happened on an ALBA low whistle. I wasn't familiar with the name and broke my own rule to trust my own ears, eyes, and judgement, so I left without it. Damn! I've since done the requisite research which only supports my firsthand opinion. It was not polymer, but aluminum with a "plastic" insert, and a sweet sweet sound. I should know better than to pass up such chances.

Live and learn.

Peace, Mooh.