High quality polyurethane foam center is soft yet supportive Modern diamond-top surface designed offers comfort Durable, thick outer skin protects protection against wear Closed cell foam construction will not absorb liquids Ergonomically designed modern diamond top surface to maximize fatigue relief Stain and chemical resistant surface easy to clean with common detergents and water Eco-friendly polyurethane blend does not contain hazardous chemicals, plasticizers, phthalates or lead-based colors Beveled edges on all four sides