The MAFM Anti-Fatigue Mat is designed to work in tandem with standing desk risers, like the Rocelco ADR, DADR, EADR, CADR and MSD series. It will help support your back, hips, knees and feet so you can get all the benefits of standing while you work. This versatile desk mat effectively I+ 1 / 2 reduces" your weight by 30% to make standing easier on your feet and joints. The advanced multi-layer construction offers a comfortable I+ 1 / 2 leather like" top surface, a memory foam inner layer and a non-slip bottom. A perfect 30" x 20" size provides plenty of room to move around, but still can fit into the kneehole of a standard desk or built-in when it is not being used. Beveled edges help to reduce tripping issues and I+ 1 / 2 " commercial grade thickness provides hours of comfort and stability. The durable materials on this desk mat will not break down, even after years of use. This product ships in approximately 1 days