Our Flannel Pillow Cases feature a 4 Inch Z-hem and are made of 100% Organic Cotton in a natural color which matches the sheets and duvet covers.  They are available in standard, and King sizes, and their level of comfort is unmatched. Our Flannel Organic Pillowcases come with an optimum thread density (165 GSM). As such, they will retain high endurance all year round.