The Big Agnes Titan 4 Footprint is protection for your Titan 4 Tent. Have another tent? Then this isn't for you. Lay it out and it's cut just slightly smaller than the tent, allowing it to shield the tent floor from water, dirt, pokes and stabs from sticks or stones. Features of the Big Agnes Titan 4 Footprint Protects and extends the life of your Big Agnes Titan 4 tent