An archival-inspired design, Coyuchi's Birch duvet cover blends undyed organic cotton and linen in a textured check weave that highlights the natural beauty of each fiber. Check pattern combines smooth sateen organic cotton and plain-weave linen stripes. Features no dyes or coloring—just the natural shades of cotton and linen. Sateen adds softness and subtle sheen, while linen brings structure and airflow. Naturally breathable and comfortable for year-round use. Pair with the matching Birch Organic Cotton Linen Sham, available separately.