The Silentnight hollowfibre duvet is treated with an antibacterial inhibitor to provide relief for allergy sufferers and asthmatics. Preventing the growth of bacteria will allow your duvet to retain that just like new feel for years. It can also help in the treatment of asthma and exzema by discouraging the presence of dust-mites. Available in a choice of tog ratings to suit all tastes with an easycare polyester cotton cover.