The company's info is below, but I have to step in here. These socks are phenomenal. They gave me a pair THREE years ago. They are the best I have ever worn. Finally remembered to place an order for them!
Black - fits 3 - 9 shoe size
Make moves comfortably in our Women's Hidden Socks - 2.0. Mindfully made to hide inside your shoe, this breathable and moisture-wicking style will provide all-day comfort with a gel grip at the heel to stop movement and slipping. Sitting right on the kick of your foot - this sock style is cut low at the ankle to ensure it stays hidden. The Women's Hidden Socks - 2.0 is a no show sock and will hug your foot just right - a perfect sock for ballet flats. Our soft sock has a comfortable yet tighter fit to reduce friction at your pressure points.
Mindfully made and crafted in breathable organically grown bamboo viscose, this everyday essential is soft, simple and sustainable. Bamboo viscose is highly breathable and comfy, making it perfect for garments that sit close to the skin. This style is naturally eco-friendly, moisture-wicking and oh so soft.