Round BolsterTRIBE brings you this high performance round bolster that offers premium support due to its size and unique kapok filling Kapok is lightweight, resistant to dust mites, mould and mildew, so it is hygienic, non toxic, hypo allergenic and environmentally friendly. Miraculous silky kapok fibre is one of the few sustainable crops, because the tree needs no cultivation or irrigation. A fully packed kapok bolster weighs under 1. 8kgs, nearly half that of a