Are heavy cushion socks good for kids?

It depends on the child's situation. Kids in rental boots or who complain of cold feet can benefit from heavy cushion socks. However, children's feet are more sensitive to circulation restriction, and the thick socks can make already-snug junior boots too tight. Kids also generate more heat relative to their size and may overheat. A medium cushion youth-specific sock is often the better default, with heavy cushion reserved for very cold days or specific comfort needs. Always choose youth-sized socks—never put kids in adult socks, which bunch dangerously inside ski boots.