These socks have a relaxed fit with no elastic at the opening. - Color: Gray系 (Gray-based) - Quantity: Set of 10 Thank you for viewing. I purchased these because I don't like the feeling of tight sock openings. This is one set from a purchase of two sets. When I tried them on, they gradually slipped down during activities like walking, so I only wear them to sleep now. Since I don't need two sets for that, I'm selling one set. They are a cotton blend and feel good against the skin, so they would be good for those who wear socks to bed. To keep shipping costs as low as possible, I will remove them from the packaging and repackage them to be under 3cm thick. Thank you for your understanding.