ThermaCare Neck, Shoulder, & Wrist HeatWraps conform to your neck, shoulder, or arm. Its continuous heat provides pain relief that lets you power through your day. Targeted Heat Therapy Single-use wraps can be applied to sore muscles and joint areas of your neck, shoulder, upper back, wrist, and elbow. Provides temporary relief from minor muscular aches and joint pains associated with overexertion, strains, and sprains, as well as minor pain associated with arthritis Allows you to move freely while delivering therapeutic heat to relax tight muscles Thin enough to wear discreetly under clothing Can be worn on the move, during chores, when relaxing, or overnight. How It Works Heat-generating ingredients (iron, charcoal, table salt, and water) warm up when exposed to oxygen in the air, providing natural heat. Wrap begins to warm immediately upon opening, reaching its therapeutic temperature within approximately 30 minutes. Low-level, consistent heat provides up to 8 hours of relief when worn over an 8-hour period. Can be used up to 8 hours a day, 7 days in a row.