The North Face Stormbreak 3 Footprint

The North Face says:
Footprints shield your tent floor from the cooler—and sometimes wet or abrasive—ground, prolonging the life of the tent floor. You can also use them in fly-only pitching with most models. Bags & Gear Tents [North Face, Northface, thenorthface, the northface, TNF, tnf]