If you have a Harbor Freight in your area check them out. The yellow ones for $3.99 will yield 2 12' straps (shorter if you sew loops into the ends like I did).
There are several threads on this. Here is a recent one.
The last post has some pictures.
“Indian builds small fire and stays warm, white man builds big fire and stays warm collecting firewood”—unknown
“The cure for anything is salt water - sweat, tears, or the sea”—Karen Blixen