"100% Cotton Shell: The shell is made of 100% cotton fabric, which is hypoallergenic, soft, and breathable, helping you achieve ideal and all-year-round comfortable sleep. Durable Quilting & Filling: Filled with breathable 200GSM polyfill for soft, lightweight warmth. The wave quilting pattern gives a crisp look and ensures the fill stays in place. It won't clump up or pull back from the corners after washing. Corner Tabs: With 4 built-in corner tabs to easily attach the cover, prevent the cotton duvet insert from shifting in the cover, and allow you to have a cozy night's sleep. Full Size: 82""x86"" All-Season Comforter/Duvet Insert: Our cotton fabric duvet is certified by OEKO-TEX Standard 100, meaning it meets high standards, can be used as a duvet alone or as a duvet insert to match your cover. Easy Care: Machine wash on a gentle cycle with cold water. Tumble dry on low heat. For optimal fluffiness, tumble dry the duvet on low heat for 10-20 minutes before first use."