They are the new Canuck brown bills, the 100s. And the 50s.
Although the manufacturers of the bills say that they boiled them for an hour there are still problems. "The [Toronto] Star’s Rick Brennan reports, the Bank of Canada has been fielding its share of complaints recently that the new plastic cash can’t take the heat. There are reports of bills melting in a tin box stashed next to a baseboard heater. Or in a wallet left, improbably, atop a toaster oven."
The Bank of Canada is pretty much in typical bureaucratic deny mode, hence the note about boiling them. Good news is that if you leave them in your Levis before you wash and dry them you should be good. "The Star’s Kaleigh Rogers ran a few of the bills through a laundromat dryer without doing them any harm."