A heavyweight option for colder months or climates, we've handpicked this duvet insert for its quality and versatility. Heavy-weight, all-season duvet insert features baffle block construction for maximum loft and minimum shifting of the down. Premium snow-white domestic down is encased in a 230-thread-count cambric cotton shell that's down- and feather-proof, preshrunk, and finished with corner anchor bands and cotton cording. Down alternative duvet inserts are also available.