Laboratoire X.O Gynopatch Painful Period 3 Patches is a disposable heat patch that relieves menstrual pain naturally and works from 5 minutes and for 8 hours. Gynopatch is a class lla medical device. How to use the patch :Take the patch out of the sachet, shake it gently: the heating reaction starts automatically and gradually. Remove the film to reveal the self-adhesive area. Place the patch on the underwear: underpants, bodysuit, etc., in the area of pain, under the stomach or back. The patch should not be in direct contact with the skin. Do not apply directly to the skin to avoid any risk of burns, special care should be taken by people with sensitive skin. Do not use on pregnant women. Do not use on children under 12 years of age. Do not use if you have an abnormal menstrual cycle (excessive bleeding). To be used under the supervision of children, the elderly and the disabled. For external use only. The distributor cannot be held responsible if the precautions for use are not observed. Store in a cool, dry, well-ventilated place. Only open the case when using the patch. Keep out of reach of children or infants. Do not use if the patch is corrupted. Be careful with the sachets that contain the patches: avoid bumping or damaging them. Indication: Painful periods. 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