Silk lays smoothly over your body and is an amazing temperature regulating insulator. Thereby saving you money as you can turn down your thermostat on those cold winter nights. The breathable, lightweight and long lasting materials come along with the luxury of Silk. It is naturally hypoallergenic, processed with little or no chemicals, and naturally is held together by sericin, a natural repellent to dust mites and other sources of allergens. If properly cared for, silk can last well over 10 years. If your comparing silk to down, remember that down pokes through the covering, deteriorates in a short amount of time, and requires chemicals to clean and remove dander and other allergens. Plus remember that silk is a renewable resource.