For whatever reason cat trees are expensive and all look alike.
When I noticed our cats really seemed to like the left over felt from my Kindle and laptop sleeve projects I decided to use it in a cat tree to replace the tiger striped abomination under our living room window.
Step 1: Inspiration
Our cats (Buckley and Loki) both seemed obsessed with the industrial felt.
The felt is F-13 from Sutherland Felt
. It's great stuff.