Salonpas Pain Relieving Patch now includes more pain-fighting medicine in every patch, 20% larger patches, and better flexibility. The patch also features improved adhesion with rounded corners that resist peeling. Salonpas Pain Relieving Patches can be worn for up to 8 hours for comfortable, convenient, and effective pain relief. They are versatile enough for use on the shoulders, neck, back, feet, calves, and joints, staying securely in place while remaining easy to remove. The patch you know and love, improved.