100% Polyester All-Season Comforter/Duvet Insert: This down alternative comforter contains the premium 300 GSM whole-piece 100% polyester fill covered in a 100% polyester shell. It provides just the right amount of warmth for winter and the ultra-softness and coziness for summer, making it an all-season comforter for coziness year-round. Multiple Size Options: The Bedsure Down Alternative Comforters are available in multiple sizes, including Twin (68"x88"), Twin XL (68"x92"), Full (82"x86"), Queen (88"x88"), King (102"x90"), Cal King (102"x96"), and Oversized King(116" x 98") . Box Stitching Design: Designed with a box-stitch construction that keeps the fluffy fill in place without shifting, the Bedsure Down Alternative Comforter ensures the filling is evenly distributed for the most relaxing sleep. Practical Design: With 8 durable tabs on each corner and side, this comforter versatilely doubles as a duvet insert to precisely match your bedding preference, should you wish to style up with a duvet cover. Easy to Care: Please gently fluff the duvet insert and let it rest for up to 24-48 hours after taking it out of the box to ensure maximum downiness. Machine wash cold separately. Use the large front-loading washer and dryer. Do not bleach or iron. Gentle cycle only.