Spinefitter by Sissel, Back Stretcher for Lower Back Pain Relief, Back Cracking Device, Back Cracker, Upper and Lower Back Stretcher, Back Decompression Device, Lumbar Stretcher, Anthracite ROTHLEY FORCEFLEX TECHNOLOGY: Glad’s patented dual layer EZYMATE FORCEFLEX TECHNOLOGY: Glad’s patented dual layer protection is designed to give extra flex as it expands around sharp edges and heavy loads while resisting punctures ERGONOMIC NECK WARMER: Microwavable heating pads by SunnyBay are specifically designed to provide comfort to aching body parts the Spinefitter helps balance your body's energy and nervous system by engaging your core muscles and specifically targeting the vertebral joints of the spine to help decrease blockages through movement It features 28 interconnected balls that help relieve tension and promote improved joint mobility