Vulkan Black Neoprene Back Support (3023) One Size spot rebounder Designed with an active lifestyle SWA023B Designed with an active lifestyle in mind New VST™ (visual spin technology) uses strategic color variance to enhance the human eye’s ability to detect spin on the ball Designed to help reduce unwanted twisting movements and is ideal for central backache or lower back pain radiating as far as the buttocks The combination of closed cell neoprene and the Aerotherm lining helps working muscles retain natural body heat and protect against sprains and strains which account for almost two thirds of all injuries Retaining heat increases local circulation improving elasticity and the range of pain free movement Healing is promoted and recovery times shortened enabling you to get back to doing the things you want to do much sooner