The X-Project features one of X-Chairs greatest innovations; Advanced Tensile Recovery (A.T.R.) Fabric. A.T.R. fabric is built to last and is tear, spill and high-wear resistant. It is a great combination of durability and flexibility and is a great addition to any office chair. Just like its siblings the X-Project is built to pass the test of times and be comfortable all the while. If it sounds to good too be true, put it to the test and try it for yourself at 5556 S Mingo Rd. In Tulsa, Oklahoma.