Fight off fatigue and common aches with Uncaged Ergonomics' anti-fatigue standing desk mat. Constructed from durable polyurethane with high-density moulded foam, this mat provides constant support and comfort while you stand. Sloped sidewalls and a massage ball lets you continuously stretch, flex, and massage muscles, keeping you active while you work. | Uncaged Ergonomics Anti-Fatigue Active Standing Desk Mat - Black