This sticky, warm patch will keep you warm on a cold winter. Provides long-lasting warmth for up to 12 hours. This product can provide heat to the body constantly, relieving rheumatism and colds, has healing effects, swelling and pain. And also safe and comfortable. This body undersuit will be your best partner in the cold winter. Made of activated carbon, safe and non-toxic. No charging, self-heating, easy and convenient. Fast heating and long-lasting, good partner in winter. Portable size and slim shape, easy to carry. Suitable for cold chills, female menstrual care and pain relief etc. Item Type: Warm Patch Sticker Material: activated carbon Quantity: 10pcs Maximum temperature: 52 ℃ Size: approx. 15 x 11.5 cm / 5.9 x 4.5 inch Package weight: about 337g Package List: 10 x warm patch stickers 1. The product should be glued to the outside of the underwear and not directly glued to the skin. 2. Be careful of low-temperature burns. Prolonged body heat will cause erythema, blisters, and other symptoms. The maximum heating temperature is 66 ℃, do not use it while sleeping at night. 3. Pregnant women and patients with diabetes and blocked blood circulation must use under the supervision of a doctor. 4. Children, disabled or sensitive skin should pay more attention to low-temperature burns. 5. Please keep the products to avoid plastic packaging, injury or damage to the vacuum bags, or the product will fail. (open vacuum bags should be used immediately, the heating effect will last 12 hours) 6. Store the products in a dry, dark place.