Kokoshnik is a fancy hat that Russian women wore a long time ago. It's made out of pretty fabric and has a bunch of decorations on it, like ribbons, beads, and flowers. The kokoshnik covers the whole head and has a special shape that makes it look like a crown. It's a very special accessory that's often worn during special events and celebrations, like weddings or really big parties. So basically, it's a really fancy hat that makes ladies look like queens!