Filled with buckwheat husks, which fit and conform to the body, the hulls will not break down with use, they work more effectively over time instead. Provides optimal support for the spine and great isolation from cool ground. The height can be easily adjusted by adding or removing buckwheat husks as the inner layer has a zipper. A built-in side handle makes the bolster easy to carry and move around. The bolster cover has an invisible zip fastening, easy to remove and wash.