All those hours at work, you move, your chair moves, the desk stays put. Even the best task chairs can't do it all, so we've brought ergonomic principles to the one element that was just sitting there. A desk that moves? Radical! A desk that promotes healthful movement? That makes sitting at a computer comfortable? It's Envelop, the first desk designed to help you, your chair, your desk, and computer work together for better health and comfort.