Is your lower back hurting or exhausted? The Inventum HNK247 takes care of this particular spot, as your lower back retains the heat well. The belt improves blood flow and relaxes the muscles. The Velcro ensures that the belt stays in place. The HNK247 has 3 temperature settings, so you'll always have the right temperature. The switch is easy to detach, so you clean the belt in the washing machine.