IncStores Premium Interlocking Foam Tiles (Blue - Royal, 12 Tiles) - Ideal for p90x, Insanity, pilates, yoga, other aerobic/cardio work outs, and kids playrooms Made from non-recycled, non-toxic, light weight and durable High Density Closed Cell EVA Foam &quot;Soft to the touch&quot; foam is 100% kid safe. Each tile comes with 2 detachable edges.