Blood Back Heat patches are drug-free pain relief patches specifically designed for back pain. These air-activated patches provide fast heating and effective relief for up to 12 hours, featuring improved adhesive properties for better application and comfort. The patches are odorless and easy to use, activating upon exposure to air. Each package contains 2 pieces that can be applied directly to the affected area of the back. The product is 100% drug-free, making it a safe option for those seeking non-medicinal pain relief solutions. The patches are designed with improved adhesive technology to ensure they stay in place during use.