First and foremost, insulation is key. Children tend to get cold easily, especially when they are playing outside. Look for ski coats that offer adequate insulation, such as synthetic fibers or down materials, to keep your little ones warm during their winter escapades. The insulation should be lightweight to allow for easy movement while still providing sufficient warmth. Brands often provide temperature ratings for their coats, so take note of these to ensure you choose a coat suitable for the expected weather conditions.