The DOWNCOOL Comforter is a twin-size duvet insert designed for all-season use. It features an ultra-soft microfiber polyester fabric covering for added fluffiness and comfort. The comforter is filled with 3D&7D goose down alternative filling, providing a lightweight yet cozy feel. The box-stitch construction ensures the fill stays in place, preventing shifting or clumping. It includes four corner tabs to secure a duvet cover. The comforter is machine washable and easy to care for, and it comes vacuum-sealed for cleanliness and convenient transportation.