SECURE FIT: The elastic rubber bands on the instep keep the socks in place without slipping off or being too tight. REINFORCED AND ENLARGED HEEL: designed to prevent slipping and premature wear. The interior construction offers a soft feel on the baby's skin. VERSATILITY IN USE: the thin areas with non-slip rubber are effective on any floor and can be worn comfortably with shoes. The design for high footwear protects the Achilles tendon and malleolus area without limiting ankle flexion. 5 FUN SOCKS FOR KIDS: Add color to the little ones' wardrobe with these non-slip socks in vibrant colors! SIZE DOUBTS: When in doubt about the size, always buy one size up.