Disposable Polypropylene X-Large Blue Shoe Covers 100-Pack - COVER-XLG-E
These boot covers will protect your shoes from soot and other gunk while you work on your chimney. They are generously sized to accommodate all shoes and boots, and they are inexpensive enough to be disposable.
WARNING: Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.