Puressential synthetic pillow unbelievably plump pillow with silicon hollowfibre filling the cover is protected against dust mites by puressential treatment with 100 naturally biodegradable active ingredientspuressential synthetic pillow filling made up exclusively of extra fine silicon hollowfibres ultra plump and ultra lightweight 100 polyester allowing better circulation of air and reducing build up of moisture 100 cotton cover with puressential dust mite treatment long lasting