SyntholKine Warming Patch Muscle Pain Back/Neck/Shoulders 2 Patches provides fast relief from pain. The principle of thermotherapy (heat) is used in the heat patch: the patch radiates therapeutic heat for 8 hours, which efficiently relieves muscle pain. The patch is comfortable and soft. It was made to perfectly harmonize with the body shapes (such as back, shoulders, neck) and adapt to movements. Thanks to the active ingredients, heat is generated when it comes into contact with the air. This heat increases blood flow, improves oxygenation, and promotes detoxification. Easy to apply and remove. This patch is discreet and odorless. Heat is emitted continuously for 8 hours to relieve spasms, relax tight muscles and soothe sore muscles. You feel calmed, relaxed and relieved and can participate in active life. Open the packaging just before use and peel off the transparent protective film. Place the sticky side on the painful area, on dry, non-inflamed skin. Remove the patch after 8 hours. Not suitable for children under the age of 12. Indication: muscle pain, cramps, sore muscles. The American Low Value Shipment Regulatory Modernization Act is active since March 2016 and increases the duty and tax free value of goods American citiziens could import from other countries by mail from $200 to $800 as well as no formal customs procedures are required. The American Low Value Shipment Regulatory Modernization Act is active since March 2016 and increases the duty and tax free value of goods American citiziens could import from other countries by mail from $200 to $800 as well as no formal customs procedures are required