The inflatable lumbar cushion can be inflated to whatever size is most comfortable for you. The cushion is inflated via a long tube and a twist valve, which means you can easily adjust the inflation level with your mouth as you are paddling. The seat base is contoured to support the curve of your thighs, providing even pressure across your whole backside. The seat back is very high with stiffening rods to ensure your back is supported as much as possible.
If comfort and back support is important to you, the lumbar seat is the perfect addition to any of the AdvancedFrame kayak models. Please note the lumbar seat can be used with the StraitEdge models, but may need some velcro to be attached to the bottom of the seat to prevent it from sliding around on the inflatable floor.