Patented heat-cell technology penetrates deep to increase circulation and accelerate the healing process.Advanced X-shaped design allows for multi-purpose application and flexible, long-lasting pain relief for aching joints and muscles.Delivers consistent low-level, therapeutic heat for up to 8 hours.Four adhesive points keep the ThermaCare HeatWrap firmly in place, delivering therapeutic heat and a comfortable fit for sustained relief.Flexible, thin design allows you to wear discreetly under clothing throughout your day.