Nichiban Roihi-Tsuboko Muscle Pain Relief Patch COOLROIHI TSUBOKO COOLcontains active ingredients such as methyl salicylate and l menthol, which are analgesic and anti inflammatory ingredients that are highly effective for relieving stiff shoulders, lower back, joints, and muscle pain.A small, inconspicuous round plaster that can be easily applied by one person.Stretchable, so it fits well on the skin.