Don’t think so, they were folded up in a sealed plastic bag. They say ‘Frost Guard’ on them and have drawstrings to pull tight around mirrors. It pretty evident what they’re intended for; I’m just wondering why in God’s name they would be needed.
People who park outside in colder climates sometimes use them so they don't have to scrape the mirrors in the morning. With all the electronics being built into mirrors these days, maybe scraping them isn't such a great idea. Perhaps they were included as a dealer perk, or somebody from the dealer's prep crew just left them there by accident.