Made of phthalate-free, PVC closed-cell foam. Two surfaces in one mat, one side ribbed and one side smooth. Superb cushioning, closed-cell foam structure. Body heat retentive, impervious to water. Easy to clean with a damp cloth. Great for Pilates mat exercise, fitness and routine daily workouts This exercise mat is far thicker than most competing yoga mats. The mat is made using an advanced foam technology, which offers superior impact absorption and comfort. No more sore ankles while you sit in lotus position, as the mat is ideal for all types of yoga, especially restorative poses. In addition, the mat"s high-quality construction ensures that it will last far longer than most standard foam mats. Additional features include a nonslip surface that grips the floor securely and a moisture-resistant skin that"s easy to clean.