A down alternative duvet filler with double stitching and cotton piping finish. Perfect for teaming with classic or contemporary style, this smart duvet is not only practical but also versatile and hypoallergenic. 100% cotton. Filling - 100% polyester down alternative. Made in USA. A down alternative duvet filler with double stitching and cotton piping finish. Perfect for teaming with classic or contemporary style, this smart duvet is not only practical but also versatile.