A silk duvet is a natural, organic product that is environmentally sustainable. It offers ultimate luxurious comfort, with fine, durable, and lightweight material that flows naturally over your body. Silk, being a natural protein, has excellent hypoallergenic properties, making it much less hospitable to dust mites. The breathable nature of silk helps your body maintain a stable temperature, keeping you cool in the summer and warm in the winter. OEKO-TEX Standard 100 Certified.