Utukky Silk Nightcap Tube Type Hangyodon 100% Silk Cost around 4500 yen at the time of purchase. Used twice. Hand-washed with delicate detergent. (I arranged it for drying, but it's wrinkled...) I haven't used it much, so I don't think the elastic part has stretched. I'm selling it because it didn't fit my head size. I will repack it in the box and send it. Please refrain from purchasing if you are concerned as it is a used item.