Description of The North Face Aguila 23 Footprint This footprint shields your tent floor from the cooler-and sometimes wet or abrasive-ground, prolonging the life of the tent floor. Footprints may also be used in fly-only pitching with most models. Features: Sizes : One Size Fabric : 70 denier 190T nylon coated with 2000 mm PU Footprints shield your tent floor from the cooler -- and sometimes wet or abrasive -- ground, prolonging the life of the tent floor. Footprints may also be used in fly-only pitching with most models.