Experience soothing relief with CVS Health Heat Therapy Patches. These small-sized patches are designed to target specific areas of discomfort. They provide deep-penetrating heat to ease muscle tension and promote relaxation. With their adhesive backing, these 4CT patches stay securely in place for long-lasting comfort. Whether you're dealing with minor aches or muscle strains, these heat therapy patches are a convenient solution for on-the-go relief. HSA/FSA EligiblePowerful pain relief: These patches provide deep muscle relaxation and pain relief for up to 8 hours.Air activated: The patches heat up quickly when exposed to air, so you can start feeling relief right away.Odorless: The patches are odorless, so you can use them discreetly anywhere.Ultra thin: The patches are ultra thin and comfortable to wear, so you can forget you're even wearing them.Made in Japan: These patches are made in Japan using high-quality materials.