ThermoActive Back Support Electrode Lotions Gels 3 * mattress * 8 MSHQ 1148B 3 * mattress * 8 inflated cell depth * Low sheer quilted machine washable cover * 4 air cell pillow function * 20 second release CPR Valves * 80 L x 36 W x 8 H ( Inflated) * 300 lb hot engine parts Patented technology provides circumferential compression in conjunction with cooling or heating therapy * Each support features 3 components: an anatomical wrap with easy to adjust hook and loop and a unique hand held pump that adjusts the level of compression * Fits circumference up to 46 as is or up to 66 with extension straps that are included * Indications: Lumbar injuries and strains Thoracic injuries and strains Post Surgical recovery back muscle soreness and spasms Sciatica SI Joint pain arthritis