Love that these cover the whole mattress. I bought 2 for both my kids. They are 5 and 3. One still has nighttime accidents sometimes and the other is potty trained, but still wears a pull up at night. We had an accident the first night we had these on the beds and they worked great! No liquid got on our sons new mattress. Which is a relief and big life saver. Highly recommend to anyone with littles who are potty training or have potty accidents at night. Might even buy another for our bed for when they sleep with ustake naps.