Here's what other sites are saying:
The Alps Mountaineering Extreme 3 Footprint adds a layer between the rough ground and the floor of your tent. The polyester fabric stands up to the rocks, sticks, and debris that can cause abrasion to your tent's floor.
ALPS Mountaineering Camp & Hike Extreme 3 Floor Saver 7711008. Polyester Webbing Loop
The ALPS Mountaineering Extreme 3 footprint protects your tent floor from abrasion and wear. Designed just a tad smaller than the tent floor, it's the perfect size to prevent pooling of water under the tent during rainy weather. Comes in stuff sack with drawcord and toggle closure. Special buy.
6 ft 8 in x 8 ft
Hilleberg Kaitum 3 Footprint
Mountainsmith Morrison Footprint
$24 - $29
The North Face VE 25 Footprint
$48 - $60
ALPS Mountaineering Tasmanian 2 Floor Saver
$25 - $32
Black Diamond Ahwahnee Ground Cloth
$41 - $49
Marmot Thor 3P Footprint