A sod cloth is a band of material 10" - 15" that is sewn in around the bottom of a tent. Its purpose is to create a seal to the ground. This is accomplished by placing sod on it (burying it) this will prevent wind and rain from entering the tent from the bottom.  We use a vynil so it is easier to clean and will not freeze to the ground as quickly as canvas.  Our sod cloth is designed to go to the inside (where the heat is) so it will not freeze to the ground.