Medical ergonomic design 360° circumferential fit. Designed according to the lumbar tructure, ergonomic, lower support, upper push-up. Powerful 4 bionic cartilage fits for strong support. Fits the curve of lumbar spine, provides strong support to the lumbar region and bears the pressure of lumbar spine. Graphene temperature-sensitive heating warms the entire waist. Electric waist warmer with rechargeable power supply. No feeling underneath 8H no waist cinching.