Mulberry Silk All Season Weight Comforter, Full Cover Cotton 100% /Fill Mulberry Silk 100% Imported Silk is a natural protein that is suitable for all skin types It does not stimulate any allergies Silk is valued for its incredible light weight, undisputed warmth, comfort and hypo-allergenic qualities Silk's protein fiber is porous and breathable creating a temperature-adjusting quality Cotton covering is soft, light weight and smooth to the touch; the long-stranded silk inside has no gaps for warmth to escape