The Wonder Pax Neck and Shoulder & Back packs

The Wonder Pax Neck &amp; Shoulder Reusable Cool Warm Compress Gel Pack Plus Single Hand Warmer.<br>Designed by a chiropractor, allowing for full coverage of the back, spine, lumbar area, arms, legs, hands knees, and elbows to relieve back tension and aches. The heat lasts 60-70 minutes so you can fall asleep and not be harmed. To use it as a cold pack, simply place it in the refrigerator until you get your desired temperature. You will wake up in the morning feeling alive, rejuvenated, energized, and focused<br><br>HOW TO USE<br>Unlike other heat packs, WonderPAX works with NO electricity, and NO microwave. They instantly warm up to 130*F/54*C with just a click of a button! You can use the flexible WonderPAX on any part of your body. This is a cutting-edge solution that’s 100% non-toxic, safe, and reusable.<br><br>Flex the disc back and forth until you hear a ‘clicking’ noise (occasionally it may require additional flexing attempts to activate the heat).<br><br><br>WonderPAX will stay hot up to 1 hour depends