Thinking I had narrowed my search to Outdoor Rugs only, I somehow ordered this rug, which has a cotton backing, and is NOT appropriate for outdoor use on a riverside, screened in porch, due to damp and possibly of mold and mildew growth.  But, I am only a week out of the hospital with physical therapy necessary, and cannot go through repackaging, shipping and return, so will keep it.  It looks fine, flat on floors, indoors.  Nothing wrong with product, except I needed OUTDOOR RUG.