KAILU's silk-filled duvet inserts are available exclusively to wholesale partners. These are perfect for menopausal women with hot flashes, hot sleepers, couples and people with allergies looking for a natural down alternative. They're handmade by female artisans who are paid fairly and equitably. Our silk insets are usually included in our Heritage Duvet Set because the silk cores and duvet covers work as a system (one tie is sewn on the raw silk core and the corresponding tie is sewn on the duvet cover), allowing customers to tie in one core for the summer and two for the winter. Wholesale partners can mix and match these with our duvet covers at your discretion. If you'd prefer to sell as a complete set, please see our Heritage Duvet Set. RAW SILK CORE(S) -100% long-strand mulberry silk fill -100% cotton fabric casing -Allergy resistant / dust-mite free -Naturally temperature regulating -Supremely breathable -Includes 8+ ties to correspond with duvet cover -Hidden zipper closure