At Kumi Kookoon only the very finest silk is used for both fabric and silk filling. Our silk comes from unbroken, undisturbed cocoons of 100% mulberry leaf-fed silkworms. All products are made to the most stringent of standards so that you will be thoroughly satisfied with the end result. Silk is allergen-free, resists mildew from forming, wicks moisture away from the body, and adjusts to the environmental temperatures. Fibres will not wander or bunch and create a more even warmth.