We have 2 cats and 3 of the biggest cat trees we could purchase. The newest one is a sort of furry thing but the other two are covered in short carpet like stuff. The only way I have found to remove all the cat hair from those, is to wet your hand and rub it in a circular motion. When your hand becomes dry and you discover that your hand is filled with a ball of cat hair, discard it. Wet your hand and repeat until you become bored, tired, nauseated or all three. Then simply wash your hands really well and VOILA!! I am always very impressed with the result and no chemicals. Might sound weird but the best way to go, just a shout out to cat lovers in the know.