Topo by Ergodriven | The Not-Flat Standing Desk Anti-Fatigue Mat with Calculated Terrain [Must-Have for Any Standing Desk] (Mulberry Purple) Every standing desk needs a good mat. Topo is the best - a great mat with next-generation features. With Topo, you'll sit less and stand comfortably because it inspires active and varied stances. Cushioned terrain drives subconscious movement - unlike distracting treadmills & balance boards. Switch between sitting and standing? Topo is engineered to be easily positioned with just one foot. Get the true benefit of standing! Feel energized & productive. More movement means a healthier you.