As the weather gets colder, These socks are designed to keep your feet warm at night and support comfortable sleep, and now a new version made with gentle materials that can be used year-round is available! The design allows you to open and close the toe area, making it easy to adjust the temperature. When it gets hot, open the toes to ensure breathability and maintain comfort. They are designed to come off easily during sleep with no elastic at the opening. -----Design & Material Points----- ・Relax with no elastic! Easy to take off during sleep ・2-way use! Socks & leg warmers ・Seams (openings) are on the instep, so the soles of your feet won't feel bumpy when walking! ・Toe opening structure allows you to free your toes while sleeping! Less stuffy and not too hot, easy to do nail care while staying warm ・Cotton pile fabric is used on the inside of the toes! Absorbs sweat for a refreshing feel on the skin