Up to 24h Pain Relief* Heat PatchPenetrating Heat Action** Cura-Heat's penetrating heat action lasts for 12 hours and once removed the pain relief can continue for a further 12 hours, resulting in up to 24 hours pain relief. Simply open the sachet and apply to your clothing/underwear where the heat radiates through to the source of pain - decreasing stiffness, improving mobility and relaxing tense/aching muscles. Non medicinal, fragrance-free, and with a thin and discreet design, Cura-Heat Back and Shoulder Pain provides a convenient way to manage your back and shoulder pain.All day pain relief, Non-medicinal, Thin and discreetAfter using the product, we would be grateful for your feedback.Please follow the link below or scan the code.https://www.surveymonkey.co.uk/r/cura-heat_back_and_shoulder_pain