The Hoolie 3 ETC Tent Footprint is shaped to fit the footprint of your tent to provide extra protection. Although Wild Country is confident that its inner tent groundsheets will outperform any similar groundsheet fabric, Wild Country recommends the use of a groundsheet protector or footprint for extra security against sharp objects. Wild Country footprints are sized to fit under each model's flysheet and attach to the tent's pole feet using shock cord loops.