Sole materialRubber particles + cotton. Newborn baby socks feature a cotton sole with non-slip rubber particles, which not only makes your child feel like they are walking on clouds, but also provides excellent slip resistance, allowing your child to to enjoy incredible comfort and play.Outer materialPlush + Cotton. Cozy baby slippers feature a simple solid color design with a beautiful floral pattern, a cute look that will make your little one's heart skip a beat. Wearing it can make your child stand out from the crowd and allow them to receive many more compliments.Interior materialSoft and thick plush. Slippers have breathable fabric and cozy fluffy lining to add an extra layer of warmth and moisture wicking, so your kids' feet can relax in the cold winter and keep your kids' feet warm without sweating, little toes warm all day and comfortable.