Deflecto Ergonomic Sit Stand Chair Mat - 45" x 53" - BlackThis dual purpose cushioned mat combines the comfort and ergonomic benefit of a standing mat with the smooth rolling surface of a traditional office chair mat. Use with standing desks and adjustable height workstations. The Ergonomic Sit Stand mat is the best anti fatigue mat for users looking to transition effortlessly from sitting to standing. With 3 8" thick anti fatigue support foam, this mat is comfortable on the feet, promotes wellness and