IncStores Premium Foam Tiles - Olive 12 Pack (48 Sqft) Great for P90x, Insanity, Pilates, Yoga, Aerobics and Kid Playrooms Made from non-recycled, non-toxic, light weight and durable High Density Closed Cell EVA Foam Two Detachable edge pieces allows any tile to be a border, corner, or center Our easy do-it-yourself tiles are an excellent protective floor covering