Introducing the NEW Biofreeze UltraFlex Lidocaine Patch! Experience up to 8 hours for targeted relief with our innovative 4-way flexibility and superior adhesion that ensures the patch stays in place*. Whether on the go or overnight, our patented technology allows the patch to move seamlessly with your body's contours, putting an end to the annoyance of patches that don't stay on. With maximum strength 4% lidocaine, the strongest available over the counter, you can effectively block pain without a prescription.*vs.