ThermoActive Back Support Beds Parts Accessories * Safety strap wraps around Chilling Units Freezer * Safety strap wraps around mattress or box spring to ensure a secure fit All return items must be returned with it's original packaging and accessories 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 a patented removable gel pack that can either be frozen or heated depending on the use