Sock slippers were conceived as a new alternative to slippers. Starting this season, they have been updated to a heathered color that mixes two colors of yarn. The fabric is now less prone to stains and pilling. The yarn is a blend of acrylic and wool, which is warm and gentle on the skin. The inside is made of thick pile knit, making it soft and comfortable to wear, like a carpet. They can be worn on bare feet, or as oversocks over socks. The print on the sole has a non-slip grip.