100% Cotton Ultra-soft: The down alternative duvet insert twin size features a 100% cotton shell that has undergone a brushed finish, providing a soft and cozy touch, certified by OEKO-TEX Standard 100, it ensures a more reassuring sleep for you Embrace Nature: The twin duvet insert is filled with Lyocell, which boasts exceptional breathability, this innovative filling material is derived from sustainable wood resourcesand has been certified by the Global Recycle Standard (GRS), bringing you closer to nature while ensuring a guilt-free sleep every night Ultimate Warmth: Our cotton comforter twin size is filled with high technology Climaloft Microfiber, distinct from traditional synthetic fillings, for exceptional lightness and compressibility. It efficiently traps and retains heat, providing lightweight warmth, as if you're floating on a cloud Hotel Quality: Box quilting distributes the filling evenly to prevent shifting and without any clumping or cool spots; double-needle stitching prevents leakage; self-fabric piping for added durability; double brushed surface is delightful against bare skin Scientific Blend for Comfort: Our duvet insert blends 20% Climaloft, 10% Lyocell and 70% polyester, perfectly combining warmth, breathability, and durability, this scientific blend not only ensures exceptional product performance but also prioritizes environmental protection, ideal for your high-quality life Dafinner Cotton Down Alternative Comforter Twin Size