ThermaCare Lower Back HeatWrap Large/XL, 8 Hours of HeatSoothe your back and hips with ThermaCare Lower Back and Hip HeatWraps. ThermaCare HeatWraps keep on working even after you take them off for up to 16 hours of back pain relief. That's 8 hours of heat while you wear it, plus 8 hours of relief after you take if off.Delivers heat that penetrates deep, warming the muscle right where it hurts - to relax, soothe and unlock tight muscles for long-lasting pain relief.Specially designed to fit your...