This item was purchased from the official Gunze online shop (exclusive to directly managed stores). These are fluffy socks that cover up to the knees. The inside is also warm. They are not constricting, so they are perfect for relaxing at home. The toes can be exposed, so you won't be cold when painting your toenails. You can also take care of your heels without taking off the socks. The exposed toes allow heat to escape, making them recommended for sleeping. Material: Main body: 100% polyester (uses cotton pile fabric for the soles) Features: Heat retention Loose fit at the opening Size: 23-25 Thank you for viewing.