New Moomin Flannel Pillowcase Approximately 45 x 65cm (for 43 x 63cm pillows) 100% Polyester This is a Moomin-designed pillowcase made of warm flannel fabric. It's fluffy, light, and gentle to the touch. The envelope style makes it easy to attach and gives a neat appearance. We've used a quick-drying material while still pursuing warmth, so you can wash it without worry, even in winter when laundry doesn't dry easily.