Gives you targeted, temporary, hours of heat relief from minor muscle/joint aches and pains. Our slim design makes it comfortable and convenient to use on your back, neck, shoulders, or wherever you need relief. It's the 'go-to' therapy for any lifestyle. Ultra thin. Heats quickly. Odorless. Non-medicinal, safe, non-irritating. Individually wrapped. 3.8 in x 5.1 in (9.5 cm x 12.8 cm).