ElleSilk Silk Duvet, Filled with 100% Natural Long Fiber Mulberry Silk, 400 Thread Count Cotton Shell, Warm in Winter, King Size Filling & Shell: Filled With 100% Natural Long Strand Mulberry Silk; Covered With 100% Cotton (400 Tc), White Size: King 104"x 86", Filling Silk Weight: 4.85 lbs. Tog: 13, perfect for Winter Benefits: Naturally hypoallergenic, our mulberry silk filled comforters are ideal for those with sensitive skin and allergies as they are naturally resistant to dust mites. A natural heat conductor, silk helps to regulate the body's temperature while you sleep to help you keep warm in winter and cool in summer Features: A discreet inspection zipper allows you to inspect the filling without damaging the silk filled comforter. Stitching keeps the filling evenly distributed and enhances the naturally breathable qualities of silk Certification: Chemical-free, no color shading or fading. OEKO-TEX Standard 100 Certified Care Instructions: Rarely requires cleaning. Simply air outside on a sunny day to freshen up. If necessary, dry clean only The silk duvet/comforters are filled with the highest grade (6A) long fiber 100% silk floss. A perfect option for people with severe allergies, this silk comforter simulates the feel of natural silk without any allergic reaction. A protein fiber, our silk is harvested from the cocoons of silkworms fed only clean, nutritious, insecticide free mulberry leaves from the finest mulberry plantation region. We are dedicated to using the organic, natural, and non-toxic materials, and have been scientifically tested and certified by Oeko-Tex Standard 100. ElleSilk is specially-commissioned and made to our exacting standards. Our pride of workmanship is evident in every thoughtful detail, making these silk duvets fresh and breathable to sleep in.