ALPS Mountaineering footprints are a great addition to any tent purchase. They are cut a little smaller than the dimension of the tent floor and have corner attachments, which help keep it in place. Simple, fast, and all at a great price. Use under an ALPS tent for extra protection. Footprints are like insurance for your tent floor. If you happen to have debris puncture your tent floor, it s much easier and less expensive to just replace a footprint than your whole tent.