Vertibax core lumbar healthcare sensory belt a class 1 medical device as used by the professionals and public the core lumbar healthcare sensory belt is worn comfortably all day, every day benefiting sufferers of sciatica, scoliosis, degenerative disc disorders and arthritis'. '.strtoupper('w')hilst being easy to fit it ensures that body heat, blood flow and compression remain consistent it is lightweight and can be worn comfortably underneath clothes its unique shape prevents the build up of muscle tension and pain in the core muscles of the lower back once fitted the lower back belt moulds to the shape of the body sizing ensures that as the waist measurement gets larger the depth of the product also increases in proportion.​ class 1 medical device suitable for sciatica, scoliosis, degenerative disc disorders arthritis retains natural body heat, blood flow compression lightweight fits comfortably under clothes moulds to your body shape sizing measurement round waist inches centimeters small 22 28.25 55.9cm 71.8cm medium 28.5 35 72.4 cm 89cm large 35.25 41 90.4cm 104.2 cm x large 41.25 46.5 104.6cm 118.1cm