Set of 5 NWOT Dragonfly Honey Bee 20"x20" Pillow Covers Printed On Both Sides

5 pillow covers, NWOT, drangonfly, honey bee, wildflower motif, 20" x 20", same pattern printed on both sides, hidden zipper construction, no tags inside regarding type of fabric, washing instructions or brand. No pillow form is included, it's just the covers. They have seemingly never been used. I presume they can be washed, but without any specific fabric type or washing instructions I would hand wash and lay flat to dry, to be on the safe side. They feel and look like linen, but I don't actually know for sure.