We handcraft this piece of cat furniture with the best materials such as solid wood, extremely thick and plush household grade carpet and unoiled sisal rope. Materials are very important if you want your furniture to be strong, sturdy, safe and comfortable for your cat and this is exactly what we strive for. The base of this cat tree is very thick to prevent your cats from tipping it over and it features a 26-inch unoiled sisal rope scratching post and will help to promote healthy scratching behaviors and healthy nails.