Offering additional protection for rugged or wet terrain, the Telos Footprints adds a 68D waterproof fabric layer under the tub floor of your tent. Makes Dry Set-up and Take-Down a breeze and allows for an easy Fly Only tent set-up for ultralight adventures. Lightfoot footprint has the same dimensions as the tent floor. Bigfoot footprint also covers your vestibule to protect your gear on those wet adventures.