A. Standard cat trees are produced from plywood and/or sturdy corrugated cardboard coated in possibly faux fur or sisal rope, that is wrapped around the scratching posts. Modern cat trees are Ordinarily made from stable wood, but they sometimes have places with sisal rope to encourage scratching. Learn about https://litter-box-system25914.answerblogs.com/25407269/the-most-effective-side-of-cat-towers