NewLife? Bio-Foam? Mats are ergonomically engineered from plant-based resources and are designed to encourage proper circulation in your feet and legs. Each mat is manufactured with Cellulon? renewable Bio-Foam?. The result is an anti-fatigue mat that supports not only your feet, legs and back, but the environment as well. NewLife Mats'' one-piece construction includes a durable top-surface, a resilient inner core, a tapered edge, and a non-skid bottom certified as "high traction" by the National Floor Safety Institute. Stone is a warm, neutral color that is understated and timeless. Similar in color to taupe, Stone brings to mind sandstone or a light limestone.