TheraPearl ThermHot 2 warming patches neck/back/shoulder/wrist patches relieve tense, tired or cramped muscles thanks to a pleasant and well-tolerated warmth for 8 hours. Made of a comfortable and soft material, the patch has compartments that contain natural elements such as iron powder, charcoal and salt, which emit heat when in contact with oxygen. Its ergonomic shape adapts to different areas of application. The patch stimulates blood flow because heat improves blood flow by dilating blood vessels and increasing the supply of oxygen and vital nutrients to muscle cells. The patch improves the elimination of secondary metabolites through improved blood flow. The patch relieves pain because the heat reduces tension, relaxes and improves mobility. Dermatologically tested. Patch Size: 29cm x 9cm Remove the protective film and place the strip on the painful area, making sure it is fully adhered to the skin. It may take about 30 minutes to reach the expected temperature. Apply patch up to 8 hours. Not recommended for people with poor circulation, heart disease, rheumatoid arthritis and pregnancy. Indication: To relieve the neck, back, shoulders, wrists in case of tiredness and muscle tension or arthrosis. 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