Voltarol Thermal patch effectively & naturally provides pain relief & deep muscle relaxation for muscle pain, back, neck & shoulder pain. The Voltarol Thermal patch is applied directly to the skin, on the site of your muscular pain. You feel the heat & relief instantly. The patch provides 10 hours of penetrating heat that works to unwind tight, aching muscles & increases circulation to help soothe pain away. Thin, discrete & designed to work on your body where it hurts, the patch helps you to get active again soon & take your mind away from pain. Directions Make Sure your skin is clean, dry & non-greasy. Carefully tear open the sachet (start tearing by notch). Remove the patch from the sachet only at the time of use. Immediately take the protective film off the adhesive part of the patch, & apply the heat patch onto your skin at the site of your muscular pain. The patch will gradually warm up to a comfortable soothing level (approximately 40