Made with purely natural herbal ingredients, they are gentle on skin. Designed to provide a soothing sensation and targeted support for the back, knee, neck, and shoulder areas 【Quick Warmth Sensation】 Our heat patches warm up rapidly.【Easy to Use and Remove】 The tiger patch is easy to use, clean the skin surface before use, peel off the protective film and apply to the skin. To remove, wet the patch with a hot towel or warm water to gently tear off tiger patch, and then wipe the residue with a hot towel And each back heat patch measuring 2.7*3.9 inches. If you have a larger range of needs, you can stick more ultra-strength joint patches to different areas at the same time 【Wide Range of Applications】 The patches are suitable for long-term sedentary workers, middle-aged and elderly people and athletes,etc. The hot patches can be used in several areas,including the neck, back, shoulders, and joints such as arms and knees